Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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-Name Regulation S-X (SX)
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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount before tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) related to interest rate swaps	$ 1,000,000	$ 0	$ 10,000,000	$ 0
Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative gains/(losses)	25,000,000	(6,000,000)	14,000,000	21,000,000
Gains/(losses), net of taxes, reclassified from accumulated other comprehensive income into earnings	0	13,000,000	9,000,000	10,000,000
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, aggregate notional value	8,205,000,000		8,205,000,000		$ 6,532,000,000
Interest rate contracts \| Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Expected transfers of unrealized gains (losses) to earnings, within next 12 months or less			1,000,000
Net derivative gains/(losses)	25,000,000	(20,000,000)	14,000,000	27,000,000
Gains/(losses), net of taxes, reclassified from accumulated other comprehensive income into earnings	0	$ 0	$ 9,000,000	$ 0
Cash Flow Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Hedged forecasted transaction period			5 years 1 month
Net investment hedge contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, aggregate notional value	7,079,000,000		$ 7,079,000,000		0
Net derivative gains/(losses)	(2,000,000)		257,000,000
After-tax gain on net investment contracts settled recorded as cumulative translation adjustment in other comprehensive income	24,000,000		24,000,000
Gains/(losses), net of taxes, reclassified from accumulated other comprehensive income into earnings	0		0
Net investment hedge contracts \| Net investment hedge debt
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses), net of taxes, recognized in income, excluded from effectiveness testing	34,000,000		84,000,000
Borrowings
Derivative Instruments, Gain (Loss) [Line Items]
Carrying amount of hedged fixed interest rate debt	$ 0		$ 0		$ 801,000,000