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SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $)
In Millions
6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Cash paid during period for:    
Interest $ 39.4 $ 24.2
Income taxes, net of refunds 148.4 155.7
Disclosure of non-cash financing and investing activities:    
Accrued repurchases of common stock $ 3.0 $ 5.5