Commitments and Contingencies - Summary of Future Minimum Payments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Non-cancelable Operating Leases, 2014	$ 10.3
Non-cancelable Operating Leases, 2015	10.0
Non-cancelable Operating Leases, 2016	7.6
Non-cancelable Operating Leases, 2017	5.2
Non-cancelable Operating Leases, 2018	3.8
Non-cancelable Operating Leases, Thereafter	2.9
Non-cancelable Operating Leases, Total minimum lease payments	39.8
Minimum Sublease Income, 2014	(1.5)
Minimum Sublease Income, 2015	(1.4)
Minimum Sublease Income, 2016	(0.3)
Minimum Sublease Income, 2017
Minimum Sublease Income, 2018
Minimum Sublease Income, Thereafter
Minimum Sublease Income, Total minimum lease payments	(3.2)
Net, 2014	8.8
Net, 2015	8.6
Net, 2016	7.3
Net, 2017	5.2
Net, 2018	3.8
Net, Thereafter	2.9
Net, Total minimum lease payments	$ 36.6

Operating leases future minimum payments due in five years net of amount received under sublease.

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Operating leases future minimum payments due in four years net of amount received under sublease.

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Operating leases future minimum payments due in three years net of amount received under sublease.

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Operating leases future minimum payments due in two years net of amount received under sublease.

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Operating leases future minimum payments due net of amount received under sublease.

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Operating leases future minimum payments due net of amount received under sublease current.

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Operating leases future minimum payments due thereafter net of amount received under sublease.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

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Amount of required minimum rental payments maturing in the next fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing after the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Future minimum rental payments in aggregate as of the balance sheet date under operating leases.

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-Name Accounting Standards Codification

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Future rental payments receivable within one year of the balance sheet date under an operating lease.

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Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.

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Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.

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Future rental payments receivable within the third year from the balance sheet date under an operating lease.

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Future rental payments receivable within the second year from the balance sheet date under an operating lease.

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- Definition

Future minimum lease payments receivable under operating leases for periods greater than five years following the balance sheet date.

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