Equity (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Stock Issued During Period, Shares, New Issues	10,400,000
Proceeds from Issuance of Common Stock		$ 271	$ 0	$ 271