Equity Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	3 Months Ended	6 Months Ended		60 Months Ended	61 Months Ended
	May. 18, 2015	Aug. 07, 2015	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Aug. 07, 2015
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares			20.8			129.5
Stock Repurchased During Period, Value			$ 271	$ 307	$ 32	$ 1,600
Stock Repurchase Program, Remaining Authorized Repurchase Amount			$ 117	$ 117		$ 117
Treasury Stock Acquired, Average Cost Per Share						$ 12.47
share repurchase program CIC buyback [Domain]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares	20.0
Stock Repurchased During Period, Value	$ 261
Treasury Stock Acquired, Average Cost Per Share	$ 13.07
Subsequent Event [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares		2.2					131.7
Stock Repurchased During Period, Value		$ 29					$ 1,600
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 88					$ 88
Treasury Stock Acquired, Average Cost Per Share							$ 12.48