Debt - Schedule of Long-Term Debt Components (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Capital Lease		$ 0.1
Transaction Costs	$ (6.3)	(1.5)
Total	498.1	609.0
2017 Credit Agreement [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Credit Agreement	73.1
2017 Credit Agreement [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit Agreement	181.3
2017 Credit Agreement [Member] \| First In Last Out Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit Agreement	100.0
2013 Note Purchase Agreement [Member]
Debt Instrument [Line Items]
Note Purchase Agreement	$ 150.0	150.0
Receivables Securitization Program [Member]
Debt Instrument [Line Items]
Credit Agreement		200.0
2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Credit Agreement		$ 260.4

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Amount, before accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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