Annual report pursuant to Section 13 and 15(d)

Lease Obligations - Future Minimum Rental Commitments for Non-Cancelable Operating Leases (Detail)

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Lease Obligations - Future Minimum Rental Commitments for Non-Cancelable Operating Leases (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Leases [Abstract]  
Operating leases due, 2015 $ 56.5us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Operating leases due, 2016 42.6us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Operating leases due, 2017 28.1us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Operating leases due, 2018 20.6us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Operating leases due, 2019 12.1us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Operating leases due, Thereafter 19.7us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Operating leases due, Total $ 179.6us-gaap_OperatingLeasesFutureMinimumPaymentsDue