Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable	$ 7	$ 6
Assets, variable interest entity	576	258
Liabilities, variable interest entity	$ 569	$ 245
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	300,000,000	300,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	3,000,000,000	3,000,000,000
Common Stock, shares issued (in shares)	99,038,837	98,802,597
Common Stock, shares outstanding (in shares)	99,038,837	98,802,597