Debt and Borrowing Arrangements - Interest and Other Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Debt Disclosure [Abstract]
Interest expense, debt	$ 127	$ 115	$ 250	$ 217
Loss on debt extinguishment	0	140	0	140
Loss/(gain) related to interest rate swaps	0	5	0	(9)
Other (income)/expense, net	(26)	(12)	(69)	(20)
Interest and other expense, net	101	248	181	328
Net investment hedge debt \| Net investment hedge derivative contracts
Debt Instrument [Line Items]
Gains (losses) included in other income related to hedge ineffectiveness	$ 34	$ 33	$ 67	$ 50

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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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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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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Amount of income (expense) related to nonoperating activities, classified as other.

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