CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	5,000	5,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500.0	500.0
Common stock, shares issued	355.2	355.2
Treasury stock, shares	13.2	13.2