Stockholders' Equity and Redeemable Noncontrolling Interest - Schedule of Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unrealized (losses) gains on securities
Beginning Balance	$ (5)	$ 2	$ 1
Pretax Gain (Loss) Amount	3	(7)	2
Tax (Benefit) Expense	0	0	1
Net-of- Tax Amount	3	(7)	1
Ending Balance	(2)	(5)	2
Foreign currency translation adjustment
Beginning Balance	(801)	(504)	(426)
Pretax Gain (Loss) Amount	(261)	(298)	(103)
Tax (Benefit) Expense	19	(1)	(25)
Net-of- Tax Amount	(280)	(297)	(78)
Ending Balance	(1,081)	(801)	(504)
Pension liability adjustments
Beginning Balance	(123)	(87)	(127)
Pretax Gain (Loss) Amount	(19)	(35)	64
Tax (Benefit) Expense	(6)	1	24
Net-of- Tax Amount	(13)	(36)	40
Ending Balance	(136)	(123)	(87)
Other comprehensive income
Accumulated gain (loss) included in other comprehensive income (loss) at beginning of the period	(929)	(589)	(552)
Pretax Gain (Loss) Amount	(277)	(340)	(37)
Tax (Benefit) Expense	13	0	0
Net-of- Tax Amount	(290)	(340)	(37)
Accumulated gain (loss) included in other comprehensive income (loss) at end of the period	$ (1,219)	$ (929)	$ (589)