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Commitments and Contingencies - Estimated Future Minimum Annual Rental Commitments Under Non-Cancelable Real and Personal Property Leases (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Future Minimum Payments Under Non Cancelable Operating Leases With Initial Terms Of One Year Or More [Line Items]  
2013 $ 68.9
2014 51.1
2015 34.7
2016 22.3
2017 17.2
Thereafter 35.6
Total $ 229.8