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SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Cash paid during period for:  
Interest$ 49.8$ 37.5
Income taxes, net of refunds225.4265.2
Disclosure of non-cash financing and investing activities:  
Accrued repurchases of common stock$ 9.0$ (0.6)