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Derivatives - BS Location (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | $ 146 | $ 78
Fair Value of Derivative Instruments, Liabilities | 53 | 197
Derivatives designated as hedging instruments |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | 132 | 48
Fair Value of Derivative Instruments, Liabilities | 47 | 172
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current assets |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | 74 | 7
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other assets |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | 39 | 20
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Liabilities | 12 | 109
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Other liabilities |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Liabilities | 4 | 56
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Current balance sheet location |  |
Location and Fair Value Amount of Derivative Instruments |  |
Derivative Notional Amount | 2,277 | 2,204
Derivatives designated as hedging instruments | Foreign currency forward/option contracts | Noncurrent balance sheet location |  |
Location and Fair Value Amount of Derivative Instruments |  |
Derivative Notional Amount | 1,099 | 1,392
Derivatives designated as hedging instruments | Interest rate swap contracts | Other assets |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | 19 | 21
Derivatives designated as hedging instruments | Interest rate swap contracts | Other current liabilities |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Liabilities | 14 | 1
Derivatives designated as hedging instruments | Interest rate swap contracts | Other liabilities |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Liabilities | 17 | 6
Derivatives designated as hedging instruments | Interest rate swap contracts | Current balance sheet location |  |
Location and Fair Value Amount of Derivative Instruments |  |
Derivative Notional Amount | 1,000 | 450
Derivatives designated as hedging instruments | Interest rate swap contracts | Noncurrent balance sheet location |  |
Location and Fair Value Amount of Derivative Instruments |  |
Derivative Notional Amount | 1,403 | 1,503
Derivatives not designated as hedging instruments |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | 14 | 30
Fair Value of Derivative Instruments, Liabilities | 6 | 25
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current assets |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Assets | 14 | 30
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Other current liabilities |  |
Location and Fair Value Amount of Derivative Instruments |  |
Fair Value of Derivative Instruments, Liabilities | 6 | 25
Derivatives not designated as hedging instruments | Foreign currency forward/option contracts | Current balance sheet location |  |
Location and Fair Value Amount of Derivative Instruments |  |
Derivative Notional Amount | $ 2,484 | $ 4,974

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 + Details
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