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Organization and Basis of Presentation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 Subsidiary	Dec. 31, 2012 Reporting_Unit
Organization And Basis Of Presentation [Line Items]
Number of wholly-owned subsidiaries	3
Number of global business divisions		3
Non-current deferred tax assets	$ 150.5	$ 150.3
Non-current deferred tax liabilities	325.5	367.0
Misclassification adjustment of non-current deferred tax assets		105.5
Misclassification adjustment of non-current deferred tax liabilities		105.5
Restatement Adjustment [Member]
Organization And Basis Of Presentation [Line Items]
Non-current deferred tax assets		150.3
Non-current deferred tax liabilities		367.0
Previously Reported [Member]
Organization And Basis Of Presentation [Line Items]
Non-current deferred tax assets		255.8
Non-current deferred tax liabilities		$ 472.5

Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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