Components of Accumulated Other Comprehensive Loss, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (908)
Other comprehensive (loss) income, unrecognized amounts on retirement benefits	(9)	$ 52	$ 69
Other comprehensive (loss) income, foreign currency translation adjustment	(583)	(680)	(314)
Other comprehensive (loss) income, unrealized gains on cash flow hedges	19	(11)	(18)
Other comprehensive income (loss)	(603)	(414)	(397)
Ending balance	(1,511)	(908)
Accumulated Other Comprehensive Loss, Net [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, unrecognized amounts on retirement benefits	(438)	(490)	(559)
Balance, foreign currency translation adjustment	(1,092)	(412)	(98)
Beginning balance	615	390	524
Beginning balance	7	18	36
Beginning balance	(908)	(494)	(97)
Other comprehensive (loss) income, unrecognized amounts on retirement benefits	(9)	52	69
Other comprehensive (loss) income, foreign currency translation adjustment	(583)	(680)	(314)
Other comprehensive (loss) income, unrealized gains on available-for-sale securities	(30)	225	(134)
Other comprehensive (loss) income, unrealized gains on cash flow hedges	19	(11)	(18)
Other comprehensive income (loss)	(603)	(414)	(397)
Balance, unrecognized amounts on retirement benefits	(447)	(438)	(490)
Balance, foreign currency translation adjustment	(1,675)	(1,092)	(412)
Ending balance	585	615	390
Ending balance	26	7	18
Ending balance	$ (1,511)	$ (908)	$ (494)