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Derivatives - Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Derivatives, Fair Value [Line Items] |  |
Hedged Liability, Fair Value Hedge | $ 1,870 | $ 1,872
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | 19 | 14
Short-term borrowings and current portion of long-term debt |  |
Derivatives, Fair Value [Line Items] |  |
Hedged Liability, Fair Value Hedge | 598 | 596
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | (1) | (4)
Long-term debt |  |
Derivatives, Fair Value [Line Items] |  |
Hedged Liability, Fair Value Hedge | 1,272 | 1,276
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | $ 20 | $ 18

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- Definition Amount of liability hedged in fair value hedging relationship. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109999712-113959 + Details
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- Definition Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4EE -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109999712-113959 + Details
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