Stockholders' Equity - Warrant Mandatory Redemption (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Apr. 03, 2014	Dec. 31, 2014
Equity [Abstract]
Warrants redeemed price (in dollars per share)	$ 0.01
Exercise of warrants for common shares (in shares)		16,244,694
Warrant or right, exercised during period (in shares)		48,734,082
Proceeds from warrant exercises		$ 187
Warrants redeemed (in shares)	8,580