Organization and Basis of Presentation - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Dec. 31, 2012 Reporting_Unit	Sep. 30, 2013 Subsidiary
Organization And Basis Of Presentation [Line Items]
Number of wholly-owned subsidiaries		3
Number of global business divisions	3
Non-current deferred tax assets	$ 150.3	$ 161.3
Non-current deferred tax liabilities	367.0	314.1
Restatement Adjustment [Member]
Organization And Basis Of Presentation [Line Items]
Misclassification adjustment of non-current deferred tax assets	105.5
Misclassification adjustment of non-current deferred tax liabilities	105.5
Previously Reported [Member]
Organization And Basis Of Presentation [Line Items]
Non-current deferred tax assets	255.8
Non-current deferred tax liabilities	$ 472.5