Debt and Financing (Details) $ in Millions | 3 Months Ended | 12 Months Ended | |
Mar. 31, 2018USD ($) | Mar. 31, 2018USD ($) | Dec. 31, 2017USD ($) |
Debt Instrument [Line Items] | | | |
Long-term Debt, Gross | $ 918.7 | $ 918.7 | |
Premium/(Discount), Debt | (9.7) | (9.7) | |
Debt Issuance Cost | (9) | (9) | |
Book Value | 900 | 900 | |
Book Value, Current Maturities | (29.3) | (29.3) | $ (30.6) |
Par Value, Excluding Current Maturities | 889.4 | 889.4 | |
Premium (Discount) | (9.7) | (9.7) | |
Book Value, Excluding Current Maturities | 870.7 | 870.7 | 875.5 |
Carrying Amount [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | 900 | 900 | 906.1 |
Fair Value [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | 929.5 | 929.5 | 929.9 |
Term Loan | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Gross | 591 | 591 | |
Premium/(Discount), Debt | (9.7) | (9.7) | |
Debt Issuance Cost | (7.8) | (7.8) | |
Book Value | 573.5 | 573.5 | |
Debt Instrument, Gross, Current Maturities | (18) | (18) | |
Premium/(Discount), Current Maturities | 0 | 0 | |
Deferred Finance Costs, Current, Net | 0 | 0 | |
Book Value, Current Maturities | $ (18) | $ (18) | |
Stated Interest Rate | 10.30% | 10.30% | |
Average Effective Interest Rate | 10.70% | 10.70% | |
Term Loan | Carrying Amount [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | $ 573.5 | $ 573.5 | 576.8 |
Term Loan | Fair Value [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | 599.1 | 599.1 | 596.9 |
Line of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Gross | 0 | 0 | |
Premium/(Discount), Debt | 0 | 0 | |
Debt Issuance Cost | 0 | 0 | |
Book Value | 0 | 0 | |
Line of credit facility, total cash and availability | 53.9 | 53.9 | |
Secured Second A&R CDA [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Gross | 26.9 | 26.9 | |
Premium/(Discount), Debt | 0 | 0 | |
Debt Issuance Cost | (0.1) | (0.1) | |
Book Value | $ 26.8 | $ 26.8 | |
Average Effective Interest Rate | 7.80% | 7.80% | |
Unsecured Second A&R CD [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Gross | $ 48.2 | $ 48.2 | |
Premium/(Discount), Debt | 0 | 0 | |
Debt Issuance Cost | (0.3) | (0.3) | |
Book Value | 47.9 | 47.9 | |
Debt Instrument, Gross, Current Maturities | (1.5) | (1.5) | |
Premium/(Discount), Current Maturities | 0 | 0 | |
Deferred Finance Costs, Current, Net | 0 | 0 | |
Book Value, Current Maturities | $ (1.5) | $ (1.5) | |
Average Effective Interest Rate | 7.80% | 7.80% | |
Lease Financing Obligations [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Gross | $ 252.6 | $ 252.6 | |
Premium/(Discount), Debt | 0 | 0 | |
Debt Issuance Cost | (0.8) | (0.8) | |
Book Value | 251.8 | 251.8 | |
Debt Instrument, Gross, Current Maturities | (9.8) | (9.8) | |
Premium/(Discount), Current Maturities | 0 | 0 | |
Deferred Finance Costs, Current, Net | 0 | 0 | |
Book Value, Current Maturities | $ (9.8) | $ (9.8) | |
Average Effective Interest Rate | 12.10% | 12.10% | |
Lease Financing Obligations [Member] | Carrying Amount [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | $ 251.8 | $ 251.8 | 254.6 |
Lease Financing Obligations [Member] | Fair Value [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | 254.2 | 254.2 | 257.7 |
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | |
Debt Instrument [Line Items] | | | |
Letters of credit outstanding, amount | 353.2 | 353.2 | |
Other Debt Obligations [Member] | Carrying Amount [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | 74.7 | 74.7 | 74.7 |
Other Debt Obligations [Member] | Fair Value [Member] | | | |
Debt Instrument [Line Items] | | | |
Long-term Debt, Fair Value | 76.2 | 76.2 | $ 75.3 |
2014 ABL Facility Credit Agreement [Member] | | | |
Debt Instrument [Line Items] | | | |
Maximum borrowing capacity (Managed Accessibility) | 13.2 | 13.2 | |
2014 ABL Facility Credit Agreement [Member] | Line of Credit [Member] | | | |
Debt Instrument [Line Items] | | | |
Line of credit facility, total cash and availability | $ 117.2 | $ 117.2 | |
Term Loan Agreement | | | |
Debt Instrument [Line Items] | | | |
Maximum Total Leverage Ratio, March 31, 2018 | 3.5 | | |
Maximum Total Leverage Ratio, June 30, 2018 | 3.5 | | |
Maximum Total Leverage Ratio, September 30, 2018 | 3.5 | | |
Maximum Total Leverage Ratio, December 31, 2018 | 3.50 | | |
Maximum Total Leverage Ratio, March 31, 2019 | 3.25 | | |
Maximum Total Leverage Ratio, June 30, 2019 | 3.25 | | |
Maximum Total Leverage Ratio, September 30, 2019 | 3.25 | | |
Maximum Total Leverage Ratio, December 31, 2019 | 3 | | |
Maximum Total Leverage Ratio, March 31, 2020 | 3 | | |
Maximum Total Leverage Ratio, June 30, 2020 | 3 | | |
Maximum Total Leverage Ratio, September 30, 2020 | 2.75 | | |
Maximum Total Leverage Ratio, December 31, 2020 | 2.75 | | |
Maximum Total Leverage Ratio, March 31, 2021 | 2.75 | | |
Maximum Total Leverage Ratio, June 30, 2021 and thereafter | 2.50 | | |
Debt Instrument, Total Leverage Ratio | | 3.32 | |
London Interbank Offered Rate (LIBOR) | Term Loan | | | |
Debt Instrument [Line Items] | | | |
Floor interest rate | 1.00% | 1.00% | |
Basis spread on variable rate | 8.50% | | |
Minimum [Member] | Secured Second A&R CDA [Member] | | | |
Debt Instrument [Line Items] | | | |
Stated Interest Rate | 6.30% | 6.30% | |
Minimum [Member] | Unsecured Second A&R CD [Member] | | | |
Debt Instrument [Line Items] | | | |
Stated Interest Rate | 6.30% | 6.30% | |
Minimum [Member] | Lease Financing Obligations [Member] | | | |
Debt Instrument [Line Items] | | | |
Stated Interest Rate | 9.00% | 9.00% | |
Maximum [Member] | Secured Second A&R CDA [Member] | | | |
Debt Instrument [Line Items] | | | |
Stated Interest Rate | 18.30% | 18.30% | |
Maximum [Member] | Unsecured Second A&R CD [Member] | | | |
Debt Instrument [Line Items] | | | |
Stated Interest Rate | 18.30% | 18.30% | |
Maximum [Member] | Lease Financing Obligations [Member] | | | |
Debt Instrument [Line Items] | | | |
Stated Interest Rate | 18.20% | 18.20% | |