v2.4.0.6
Income Taxes (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Current:      
Federal $ 201.7 $ 253.9 $ 337.3
State 38.6 50.2 49.1
Federal and state deferred provision (benefit) 334.8 61.3 (24.6)
Non-current tax provision (257.7) 4.0 6.7
Provision for income taxes $ 317.4 $ 369.5 $ 368.5