Employee Benefit Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Compensation expense	$ 20	$ 17	$ 12
Net periodic expense	6	6	$ 6
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Liabilities	$ 118	$ 109