Commitments and Contingencies - Summary of Future Minimum Payments (Detail) $ in Millions	Dec. 31, 2016 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Non-cancelable Operating Leases, 2017	$ 10.3
Non-cancelable Operating Leases, 2018	8.9
Non-cancelable Operating Leases, 2019	7.2
Non-cancelable Operating Leases, 2020	4.6
Non-cancelable Operating Leases, 2021	2.8
Non-cancelable Operating Leases, Thereafter	1.0
Non-cancelable Operating Leases, Total minimum lease payments	34.8
Minimum Sublease Income, 2017	(0.4)
Minimum Sublease Income, 2018	(0.1)
Minimum Sublease Income, 2019	(0.1)
Minimum Sublease Income, Total minimum lease payments	(0.6)
Net, 2017	9.9
Net, 2018	8.8
Net, 2019	7.1
Net, 2020	4.6
Net, 2021	2.8
Net, Thereafter	1.0
Net, Total minimum lease payments	$ 34.2

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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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 10
-Section 55
-Paragraph 40
-Subparagraph (Note 3)
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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718

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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 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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