Schedule Of U.S. Federal, State And Foreign Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
U.S. federal	$ 132.0	$ 92.7	$ 79.0
State, Current	27.7	16.3	15.4
Foreign, Current	19.8	16.6	14.3
Current income tax expense (benefit)	179.5	125.6	108.7
U.S. federal, Deferred	11.4	48.7	34.0
State, Deferred	1.6	(3.3)	8.0
Foreign, Deferred	0.2	14.0	(3.1)
Deferred income tax expense (benefit)	13.2	59.4	38.9
Recorded tax expense	$ 192.7	$ 185.0	$ 147.6