Consolidated Statement of Shareholders' Equity (USD $) In Millions, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income	Deferred Equity Compensation
Balance at Dec. 31, 2013	$ 5,115	$ 2	$ 2,466	$ 2,482	$ 160	$ 5
Balance (in shares) at Dec. 31, 2013		182,177,866
Increase (Decrease) in Shareholders' Equity
Net income (loss)	42			42
Dividends ($0.11 per share)	(20)			(20)
Common stock repurchases (in shares)		(1,350,443)
Common stock repurchases	(35)	0	(35)
Share-based compensation and other (in shares)		331,285
Share-based compensation and other	3	0	3			0
Other comprehensive income	104				104
Balance at Mar. 31, 2014	$ 5,209	$ 2	$ 2,434	$ 2,504	$ 264	$ 5
Balance (in shares) at Mar. 31, 2014		181,158,708