Income Tax Provision (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Federal	$ 115,000,000	$ 170,000,000	$ 168,300,000
Foreign	40,000,000	23,300,000	31,800,000
State	15,600,000	7,800,000	10,300,000
Current provision, total	170,600,000	201,100,000	210,400,000
Federal	34,200,000	(18,900,000)	3,700,000
Foreign	(4,200,000)	(2,700,000)	(7,200,000)
State	1,700,000	3,300,000	1,200,000
Deferred (benefit) provision, total	31,700,000	(18,300,000)	(2,300,000)
Income tax provision	$ 202,300,000	$ 182,800,000	$ 208,100,000