Income Tax Provision (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Federal	$ 468,500,000	$ 115,000,000	$ 170,000,000
Foreign	37,200,000	40,000,000	23,300,000
State	57,600,000	15,600,000	7,800,000
Current provision, total	563,300,000	170,600,000	201,100,000
Federal	(29,900,000)	34,200,000	(18,900,000)
Foreign	(3,800,000)	(4,200,000)	(2,700,000)
State	(6,000,000)	1,700,000	3,300,000
Deferred (benefit) provision, total	(39,700,000)	31,700,000	(18,300,000)
Income tax provision	$ 523,600,000	$ 202,300,000	$ 182,800,000