Earnings (Loss) per Common Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Consolidated net income (loss)	$ 54	$ (53)	$ (149)	$ (135)
Weighted average common shares outstanding, basic (in shares)	111,928,113
Assumed exercise or issuance of shares relating to stock plans (in shares)	1,411,772
Weighted average common shares outstanding, diluted (in shares)	113,339,885
Earnings Per Share, Basic (in dollars per share)	$ 0.48
Earnings Per Share, Diluted (in dollars per share)	$ 0.48
Antidilutive securities excluded from earnings per common share computation (in shares)	1,000,000