| **Employee Benefit Plans - Schedule of Future Expected Benefit Payments (Details) (USD $)In Millions, unless otherwise specified** | Dec. 31, 2014                                                                                                                                                                                                      |
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| United States Pension Plan of US Entity [Member]                                                                                   |                                                                                                                                                                                                               |
| **Defined Benefit Plan Disclosure**                                                                                                |                                                                                                                                                                                                               |
| 2015                                                                                                                               | $ 39us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember         |
| 2016                                                                                                                               | 43us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember                    |
| 2017                                                                                                                               | 46us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember                  |
| 2018                                                                                                                               | 49us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember                   |
| 2019                                                                                                                               | 52us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember                   |
| 2020-2024                                                                                                                          | 303us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_UnitedStatesPensionPlansOfUSEntityDefinedBenefitMember |
| Foreign Pension Plan [Member]                                                                                                      |                                                                                                                                                                                                               |
| **Defined Benefit Plan Disclosure**                                                                                                |                                                                                                                                                                                                               |
| 2015                                                                                                                               | 24us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_ForeignPensionPlansDefinedBenefitMember                          |
| 2016                                                                                                                               | 24us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_ForeignPensionPlansDefinedBenefitMember                                   |
| 2017                                                                                                                               | 28us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_ForeignPensionPlansDefinedBenefitMember                                 |
| 2018                                                                                                                               | 31us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_ForeignPensionPlansDefinedBenefitMember                                  |
| 2019                                                                                                                               | 37us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_ForeignPensionPlansDefinedBenefitMember                                  |
| 2020-2024                                                                                                                          | 207us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_ForeignPensionPlansDefinedBenefitMember                |
| Other Postretirement Benefits                                                                                                      |                                                                                                                                                                                                               |
| **Defined Benefit Plan Disclosure**                                                                                                |                                                                                                                                                                                                               |
| 2015                                                                                                                               | 13us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember              |
| 2016                                                                                                                               | 13us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember                       |
| 2017                                                                                                                               | 12us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember                     |
| 2018                                                                                                                               | 12us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember                      |
| 2019                                                                                                                               | 11us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember                      |
| 2020-2024                                                                                                                          | $ 53us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis= us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember   |

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| - Definition
Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
+ 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 (f) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920
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| - Definition
Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
+ 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 (f) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920
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| - Definition
Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
+ 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 (f) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920
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| - Definition
Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
+ 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 (f) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920
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| - Definition
Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
+ 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 (f) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920
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| - Definition
Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.
+ 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 (f) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920
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