Hedging Activities (Effect on Consolidated Financial Statements) (Details) - Not Designated as Hedging Instrument [Member] - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Gain (loss) recognized in income		$ (86)	$ 487	$ 96	$ (154)
Foreign Exchange Contracts, Balance Sheet [Member] | Other Income, Net [Member]
Gain (loss) recognized in income		21	29	19	10
Foreign Exchange Contracts, Loans [Member] | Translated Earnings Contract Gain (Loss), Net [Member]
Gain (loss) recognized in income	[1]	$ (107)	$ 458	$ 77	$ (164)

[1] The impact to income was primarily driven by yen-denominated hedges of translated earnings