Income Taxes - Summary of Our Domestic and Foreign Income Before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Domestic	$ 64	$ 67	$ 146
Foreign	87	172	176
Income before income taxes	$ 151	$ 239	$ 322