Provision for Income Taxes Reconciles with U.S. Federal Statutory Rate (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2009	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Reconciliation of Statutory Federal Tax Rate [Line Items]
Federal statutory rate		35.00%		35.00%		35.00%
Provision computed at federal statutory rate		$ 142.8		$ 131.3		$ 115.9
State and local taxes, net of federal tax benefit		5.9		2.9		4.8
Foreign		3.1		2.4		(3.2)
Valuation Allowance		(0.6)	[1]	(3.2)	[1]	(8.3)	[1]
Tax reserves		(1.1)		0.8		1.0
Currency and other tax effects of Brazil transaction		20.5
Other		(2.6)	[2]	(2.3)	[2]	(3.6)	[2]
Provision for income taxes	$ 7.3	$ 168.0		$ 131.9		$ 106.6
Effective income tax rate		41.20%		35.10%		32.20%

[1] During the fourth quarter of 2009, we recognized a $7.3 million income tax benefit related to our ability to utilize foreign tax credits beyond 2009. This reduced our 2009 effective tax rate by 2.1%.

[2] Includes the benefit related to an investment loss in a subsidiary recognized during the third quarter of 2009.