Other Financial Data - Schedule of Other Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Financial Data [Abstract]
Equity earnings	$ 13	$ 13	$ 12
Net gain on disposals of businesses	39	82	24
Foreign currency remeasurement (loss) gain	(2)	30	18
(Loss) income on financial instruments	(14)	(24)	(15)
Other	0	(1)	5
Other income	$ 36	$ 100	$ 44