| **Pension and Other Post Retirement Benefit Plans Pension and Other Post Retirement Benefit Plans - Schedule of Plan Assets by Category (Details)** | 12 Months Ended |
|-----------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                    |            |   |
| Actual Plan Asset Allocations                                                                                                                       | 100.00%         | 100.00% |
| Target Plan Asset Allocations                                                                                                                       | 100.00%         | 100.00% |
| Cash and cash equivalents                                                                                                                           |            |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                    |            |   |
| Actual Plan Asset Allocations                                                                                                                       | 1.30%           | 3.20% |
| Target Plan Asset Allocations                                                                                                                       | 3.00%           | 3.00% |
| Equity securities                                                                                                                                   |            |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                    |            |   |
| Actual Plan Asset Allocations                                                                                                                       | 53.70%          | 49.70% |
| Target Plan Asset Allocations                                                                                                                       | 51.00%          | 51.00% |
| Debt securities                                                                                                                                     |            |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                    |            |   |
| Actual Plan Asset Allocations                                                                                                                       | 43.00%          | 45.50% |
| Target Plan Asset Allocations                                                                                                                       | 44.00%          | 44.00% |
| Alternative investments                                                                                                                             |            |   |
| **Defined Benefit Plan Disclosure [Line Items]**                                                                                                    |            |   |
| Actual Plan Asset Allocations                                                                                                                       | 2.00%           | 1.60% |
| Target Plan Asset Allocations                                                                                                                       | 2.00%           | 2.00% |

| X                                                                                                                                                                         |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_DefinedBenefitPlanDisclosureLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Target allocation of investments of this type to total plan assets presented on a weighted average basis.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920
+ Details**Name:**us-gaap_DefinedBenefitPlanTargetPlanAssetAllocations**Namespace Prefix:**us-gaap_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(1) -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.
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