Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Gross unrecognized tax benefits	$ 26.5
Amount of tax benefits that, if recognized, would impact the effective tax rate	24.5
Payment of penalties	0.9
Payment of interest expense	5.9
Unremitted earnings attributable to international subsidiaries	261.1
Deferred tax assets related to a foreign tax credit carryover and related to state net operating losses	3.3	2.3
Foreign tax credit expiration date	The foreign tax credit is eligible for carryforward until the tax period ending December 31, 2016.
Non-U.S. tax losses available for carryforward	82.3	49.6
State tax losses available for carryforward	69.2	69.3
Foreign Country
Income Taxes [Line Items]
Deferred tax assets, valuation allowance	11.7	9.4
Operating losses expiration period	subject to varying expiration periods and will begin to expire in 2012
State and Local Jurisdiction
Income Taxes [Line Items]
Deferred tax assets, valuation allowance	1.5	2.4
Operating losses expiration period	Certain state tax losses will expire in 2012, while others are subject to carryforward periods of up to twenty years.
Minimum
Income Taxes [Line Items]
Possible amount of decrease during the next twelve months primarily as a result of the resolution of federal, state and foreign examinations and the expiration of various statutes of limitations	0
Maximum
Income Taxes [Line Items]
Possible amount of decrease during the next twelve months primarily as a result of the resolution of federal, state and foreign examinations and the expiration of various statutes of limitations	$ 18.7
Maximum | State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards, expiration period	20 years