Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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.

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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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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after accumulated amortization, of debt discount (premium).

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

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Amount, after 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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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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

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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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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Proceeds from issuance of capital stock which provides for a specific dividend that is paid to the shareholders before any dividends to common stockholders and which takes precedence over common stockholders in the event of liquidation.

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Debt Instrument, Face Amount, Excluding Current Maturities

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Debt Instrument, Floor Interest Rate

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Debt Instrument, Gross, Current Maturities

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Debt Instrument, Unamortized Discount (Premium), Net, Current Maturities

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Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities

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Payments for Fees, Expenses and Original Issue Discount

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Repayments of debt, including accrued interest

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Sources of Funds

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Debt And Financing - Total Debt (Details) - USD ($) $ in Millions		12 Months Ended
	Feb. 13, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Par value		$ 1,010.3	$ 1,081.9
Premium/(Discount), Debt		(2.7)	(4.3)
Debt Issuance Costs, Noncurrent, Net		(10.5)	(15.2)
Long-term debt		997.1	1,062.4
Long-term Debt, Current Maturities		(16.8)	(15.9)
Par value, excluding current maturities		993.5	1,066.0
Premium/(Discount), Noncurrent Maturities		(2.7)	(4.3)
Long-term debt, less current portion		980.3	1,046.5
Gain (Loss) on Extinguishment of Debt		0.0	(0.6)	$ 11.2
Term Loan
Debt Instrument [Line Items]
Par value		638.5	686.0
Premium/(Discount), Debt		(2.7)	(4.3)
Debt Issuance Costs, Noncurrent, Net		(8.6)	(12.7)
Long-term debt		$ 627.2	$ 669.0
Interest rate		8.00%	8.25%
Effective Interest Rate		8.20%	8.45%
Par Value, Current Maturities		$ (6.7)	$ (7.0)
Premium/(Discount), Current Maturities		0.0	0.0
Debt Issuance Costs, Current, Net		0.0	0.0
Long-term Debt, Current Maturities		(6.7)	(7.0)
Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Par value		0.0	0.0
Premium/(Discount), Debt		0.0	0.0
Debt Issuance Costs, Noncurrent, Net		0.0	0.0
Long-term debt		0.0	0.0
Secured Second A&R CDA
Debt Instrument [Line Items]
Par value		28.7	44.7
Premium/(Discount), Debt		0.0	0.0
Debt Issuance Costs, Noncurrent, Net		(0.6)	(0.3)
Long-term debt		$ 28.1	$ 44.4
Effective Interest Rate		7.50%	7.30%
Unsecured Second A&R CDA
Debt Instrument [Line Items]
Par value		$ 73.2	$ 73.2
Premium/(Discount), Debt		0.0	0.0
Debt Issuance Costs, Noncurrent, Net		0.0	(0.5)
Long-term debt		$ 73.2	$ 72.7
Effective Interest Rate		7.50%	7.30%
Lease financing obligations
Debt Instrument [Line Items]
Par value		$ 269.9	$ 278.0
Premium/(Discount), Debt		0.0	0.0
Debt Issuance Costs, Noncurrent, Net		(1.3)	(1.7)
Long-term debt		$ 268.6	$ 276.3
Effective Interest Rate		12.00%	12.00%
Par Value, Current Maturities		$ (10.1)	$ (8.9)
Premium/(Discount), Current Maturities		0.0	0.0
Debt Issuance Costs, Current, Net		0.0	0.0
Long-term Debt, Current Maturities		$ (10.1)	$ (8.9)
2014 Financing [Member]
Debt Instrument [Line Items]
Sources of Funds	$ 1,040.0
Payments for Fees, Expenses and Original Issue Discount	50.8
Proceeds from Issuance of Preferred Stock and Preference Stock	35.0
2014 Financing [Member] \| Series A Note
Debt Instrument [Line Items]
Repayments of debt, including accrued interest	$ 93.9
Minimum \| Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Interest rate		1.75%	2.00%
Minimum \| Secured Second A&R CDA
Debt Instrument [Line Items]
Interest rate		3.30%	3.30%
Minimum \| Unsecured Second A&R CDA
Debt Instrument [Line Items]
Interest rate		3.30%	3.30%
Minimum \| Lease financing obligations
Debt Instrument [Line Items]
Interest rate		9.00%	10.00%
Maximum \| Line of Credit \| ABL Facility
Debt Instrument [Line Items]
Interest rate			2.50%
Maximum \| Secured Second A&R CDA
Debt Instrument [Line Items]
Interest rate		18.30%	18.30%
Maximum \| Unsecured Second A&R CDA
Debt Instrument [Line Items]
Interest rate		18.30%	18.30%
Maximum \| Lease financing obligations
Debt Instrument [Line Items]
Interest rate		18.20%	18.20%
LIBOR \| Term Loan
Debt Instrument [Line Items]
Floor Interest Rate		1.00%	1.00%
LIBOR \| Minimum \| Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		7.00%	7.00%
LIBOR \| Maximum \| Term Loan
Debt Instrument [Line Items]
Basis spread on variable rate		7.25%	7.25%