Debt - Schedule of Debt (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Debt, gross	$ 2,174.3
Unamortized Debt Issuance Costs	(14.5)	$ (21.0)
Total debt	2,159.8	2,194.3
Less: Current maturities of long-term debt	(22.7)	(15.7)
Long-term debt, net	$ 2,137.1	2,178.6
Senior Secured Second Priority Notes \| 2022 Notes
Debt Instrument [Line Items]
Weighted Average Effective Interest Rate at December 31, 2017	7.88%
Weighted Average Stated Interest Rate at December 31, 2017	7.50%
Debt, gross	$ 488.0	610.0
Senior Secured Second Priority Notes \| 2024 Notes
Debt Instrument [Line Items]
Weighted Average Effective Interest Rate at December 31, 2017	8.06%
Weighted Average Stated Interest Rate at December 31, 2017	7.75%
Debt, gross	$ 500.0	625.0
Capital leases
Debt Instrument [Line Items]
Weighted Average Effective Interest Rate at December 31, 2017	4.62%
Weighted Average Stated Interest Rate at December 31, 2017	4.62%
Debt, gross	$ 118.2
Capital leases \| Capital leases
Debt Instrument [Line Items]
Weighted Average Effective Interest Rate at December 31, 2017	4.02%
Debt, gross	$ 53.7	70.3
Senior Secured Revolving Credit Facility \| Line of Credit \| ABL Credit Facility
Debt Instrument [Line Items]
Weighted Average Stated Interest Rate at December 31, 2017	3.26%
Debt, gross	$ 1,130.0	910.0
Senior Secured Revolving Credit Facility \| Line of Credit \| Other borrowings
Debt Instrument [Line Items]
Weighted Average Stated Interest Rate at December 31, 2017	4.79%
Debt, gross	$ 2.6	0.0
Other long-term assets \| Senior Secured Revolving Credit Facility \| Line of Credit \| ABL Credit Facility
Debt Instrument [Line Items]
Unamortized debt issuance costs related to credit facility	$ 13.3	$ 17.1

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Amount, after accumulated amortization, of debt issuance costs related to line of credit arrangements. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section S45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68176171&loc=SL68176184-208336

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Weighted average interest rate of debt outstanding.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

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Amount of long-term debt and capital lease obligations including current maturities.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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