| **Condensed Consolidating Guarantor and Non-Guarantor Financial Information Statement of Cash Flows (Details) (USD $)In Millions, unless otherwise specified** | 12 Months Ended |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Condensed Financial Statements, Captions [Line Items]**                                                                                                      |            |   |   |
| Net cash provided by (used in) operations                                                                                                                      | $ 880           | $ 1,107 | $ 1,238 |
| **Cash flow from investment activities**                                                                                                                       |            |   |   |
| Net change in restricted cash and cash equivalents                                                                                                             | (147)           | 515 | 71 |
| Net sales (purchases) of marketable securities                                                                                                                 | (132)           | (586) | 2 |
| Capital expenditures                                                                                                                                           | (500)           | (279) | (197) |
| Other investing activities                                                                                                                                     | (44)            | (84) | (88) |
| Net cash provided by (used in) investing activities                                                                                                            | (823)           | (434) | (212) |
| **Cash flows from financing activities**                                                                                                                       |            |   |   |
| Net borrowings (repayments) of debt                                                                                                                            | 38              | (1,278) | (690) |
| Other financing activities                                                                                                                                     | (138)           | (22) | (74) |
| Net cash provided by (used in) financing activities                                                                                                            | (100)           | (1,300) | (764) |
| Effect of exchange rate changes on cash and cash equivalents                                                                                                   | (3)             | 0 | 9 |
| Increase (decrease) in cash and cash equivalents during the period                                                                                             | (46)            | (627) | 271 |
| Increase in cash and cash equivalents upon consolidation of BDP and BDT                                                                                        | 0               | 0 | 80 |
| Cash and cash equivalents at beginning of the year                                                                                                             | 585             | 1,212 | 861 |
| Cash and cash equivalents at end of the year                                                                                                                   | 539             | 585 | 1,212 |
| NIC [Member]                                                                                                                                                   |            |   |   |
| **Condensed Financial Statements, Captions [Line Items]**                                                                                                      |            |   |   |
| Net cash provided by (used in) operations                                                                                                                      | (44)            | (174) | 165 |
| **Cash flow from investment activities**                                                                                                                       |            |   |   |
| Net change in restricted cash and cash equivalents                                                                                                             | 0               | 0 | (19) |
| Net sales (purchases) of marketable securities                                                                                                                 | (55)            | (374) | 1 |
| Capital expenditures                                                                                                                                           | 0               | 0 | 0 |
| Other investing activities                                                                                                                                     | 0               | (20) | 0 |
| Net cash provided by (used in) investing activities                                                                                                            | (55)            | (394) | (18) |
| **Cash flows from financing activities**                                                                                                                       |            |   |   |
| Net borrowings (repayments) of debt                                                                                                                            | 91              | (20) | 166 |
| Other financing activities                                                                                                                                     | (5)             | 35 | (53) |
| Net cash provided by (used in) financing activities                                                                                                            | 86              | 15 | 113 |
| Effect of exchange rate changes on cash and cash equivalents                                                                                                   | 0               | 0 | 0 |
| Increase (decrease) in cash and cash equivalents during the period                                                                                             | (13)            | (553) | 260 |
| Increase in cash and cash equivalents upon consolidation of BDP and BDT                                                                                        |            |   | 0 |
| Cash and cash equivalents at beginning of the year                                                                                                             | 239             | 792 | 532 |
| Cash and cash equivalents at end of the year                                                                                                                   | 226             | 239 | 792 |
| Navistar, Inc. [Member]                                                                                                                                        |            |   |   |
| **Condensed Financial Statements, Captions [Line Items]**                                                                                                      |            |   |   |
| Net cash provided by (used in) operations                                                                                                                      | (66)            | (421) | (55) |
| **Cash flow from investment activities**                                                                                                                       |            |   |   |
| Net change in restricted cash and cash equivalents                                                                                                             | 0               | 0 | (4) |
| Net sales (purchases) of marketable securities                                                                                                                 | 0               | 0 | 0 |
| Capital expenditures                                                                                                                                           | (264)           | (107) | (46) |
| Other investing activities                                                                                                                                     | (12)            | (84) | (71) |
| Net cash provided by (used in) investing activities                                                                                                            | (276)           | (191) | (121) |
| **Cash flows from financing activities**                                                                                                                       |            |   |   |
| Net borrowings (repayments) of debt                                                                                                                            | 333             | 598 | 185 |
| Other financing activities                                                                                                                                     | 0               | 0 | 0 |
| Net cash provided by (used in) financing activities                                                                                                            | 333             | 598 | 185 |
| Effect of exchange rate changes on cash and cash equivalents                                                                                                   | 0               | 0 | 0 |
| Increase (decrease) in cash and cash equivalents during the period                                                                                             | (9)             | (14) | 9 |
| Increase in cash and cash equivalents upon consolidation of BDP and BDT                                                                                        |            |   | 0 |
| Cash and cash equivalents at beginning of the year                                                                                                             | 22              | 36 | 27 |
| Cash and cash equivalents at end of the year                                                                                                                   | 13              | 22 | 36 |
| Non-Guarantor Subsidiaries [Member]                                                                                                                            |            |   |   |
| **Condensed Financial Statements, Captions [Line Items]**                                                                                                      |            |   |   |
| Net cash provided by (used in) operations                                                                                                                      | 556             | 1,041 | 894 |
| **Cash flow from investment activities**                                                                                                                       |            |   |   |
| Net change in restricted cash and cash equivalents                                                                                                             | (147)           | 515 | 94 |
| Net sales (purchases) of marketable securities                                                                                                                 | (77)            | (212) | 1 |
| Capital expenditures                                                                                                                                           | (236)           | (172) | (151) |
| Other investing activities                                                                                                                                     | (32)            | (13) | (78) |
| Net cash provided by (used in) investing activities                                                                                                            | (492)           | 118 | (134) |
| **Cash flows from financing activities**                                                                                                                       |            |   |   |
| Net borrowings (repayments) of debt                                                                                                                            | 48              | (1,195) | (807) |
| Other financing activities                                                                                                                                     | (133)           | (24) | 40 |
| Net cash provided by (used in) financing activities                                                                                                            | (85)            | (1,219) | (767) |
| Effect of exchange rate changes on cash and cash equivalents                                                                                                   | (3)             | 0 | 9 |
| Increase (decrease) in cash and cash equivalents during the period                                                                                             | (24)            | (60) | 2 |
| Increase in cash and cash equivalents upon consolidation of BDP and BDT                                                                                        |            |   | 80 |
| Cash and cash equivalents at beginning of the year                                                                                                             | 324             | 384 | 302 |
| Cash and cash equivalents at end of the year                                                                                                                   | 300             | 324 | 384 |
| Eliminations and Other [Member]                                                                                                                                |            |   |   |
| **Condensed Financial Statements, Captions [Line Items]**                                                                                                      |            |   |   |
| Net cash provided by (used in) operations                                                                                                                      | 434             | 661 | 234 |
| **Cash flow from investment activities**                                                                                                                       |            |   |   |
| Net change in restricted cash and cash equivalents                                                                                                             | 0               | 0 | 0 |
| Net sales (purchases) of marketable securities                                                                                                                 | 0               | 0 | 0 |
| Capital expenditures                                                                                                                                           | 0               | 0 | 0 |
| Other investing activities                                                                                                                                     | 0               | 33 | 61 |
| Net cash provided by (used in) investing activities                                                                                                            | 0               | 33 | 61 |
| **Cash flows from financing activities**                                                                                                                       |            |   |   |
| Net borrowings (repayments) of debt                                                                                                                            | (434)           | (661) | (234) |
| Other financing activities                                                                                                                                     | 0               | (33) | (61) |
| Net cash provided by (used in) financing activities                                                                                                            | (434)           | (694) | (295) |
| Effect of exchange rate changes on cash and cash equivalents                                                                                                   | 0               | 0 | 0 |
| Increase (decrease) in cash and cash equivalents during the period                                                                                             | 0               | 0 | 0 |
| Increase in cash and cash equivalents upon consolidation of BDP and BDT                                                                                        |            |   | 0 |
| Cash and cash equivalents at beginning of the year                                                                                                             | 0               | 0 | 0 |
| Cash and cash equivalents at end of the year                                                                                                                   | $ 0             | $ 0 | $ 0 |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                         |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash inflow associated with the consolidation of a business (i.e. a business that was not previously consolidated) during the period (for example, cash that was held by the consolidated business).
+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The increase (decrease) during the reporting period in cash and cash equivalents. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The effect of exchange rate changes on cash balances held in foreign currencies.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow from financing activity for the period.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow from investing activity.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash paid (received) associated with the acquisition or disposal of all investments, including securities and other assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3098-108585Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3095-108585
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3213-108585Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133
+ Details**Name:**us-gaap_PaymentsToAcquireProductiveAssets**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**credit**Period Type:**duration |
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| - Definition
The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3095-108585Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18, 19, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3098-108585
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| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 18 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228
+ Details**Name:**us-gaap_ProceedsFromRepaymentsOfDebt**Namespace Prefix:**us-gaap_**Data Type:**xbrli:monetaryItemType**Balance Type:**debit**Period Type:**duration |