Other Financial Data - Schedule of Other Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Financial Data [Abstract]
Equity earnings	$ 13	$ 12	$ 20
Net gain on disposals of businesses	82	24	10
Foreign currency remeasurement gain	30	18	13
(Loss) income on financial instruments	(24)	(15)	18
Other	(1)	5	7
Other income	$ 100	$ 44	$ 68