Debt and Financing (Details) $ in Millions | 3 Months Ended | 12 Months Ended | |
Mar. 31, 2017USD ($) | Mar. 31, 2016USD ($) | Mar. 31, 2017USD ($) | Dec. 31, 2016USD ($) |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | $ 1,004.8 | | $ 1,004.8 | |
Premium/(Discount), Debt | (2.4) | | (2.4) | |
Debt Issuance Cost | (12.2) | | (12.2) | |
Book Value | 990.2 | | 990.2 | |
Book Value, Current Maturities | (17.3) | | (17.3) | $ (16.8) |
Par Value, Excluding Current Maturities | 987.5 | | 987.5 | |
Premium (Discount) | (2.4) | | (2.4) | |
Book Value, Excluding Current Maturities | 972.9 | | 972.9 | 980.3 |
Operating leases, future minimum payments due | 316.6 | | 316.6 | |
Acquisition of property and equipment | (16.3) | $ (19.8) | | |
Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 990.2 | | 990.2 | 997.1 |
Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 983.6 | | 983.6 | 999 |
Term Loan | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | 636.9 | | 636.9 | |
Premium/(Discount), Debt | (2.4) | | (2.4) | |
Debt Issuance Cost | (10.5) | | (10.5) | |
Book Value | 624 | | 624 | |
Debt Instrument, Gross, Current Maturities | (6.8) | | (6.8) | |
Premium/(Discount), Current Maturities | 0 | | 0 | |
Deferred Finance Costs, Current, Net | 0 | | 0 | |
Book Value, Current Maturities | $ (6.8) | | $ (6.8) | |
Stated Interest Rate | 8.50% | | 8.50% | |
Average Effective Interest Rate | 8.70% | | 8.70% | |
Term Loan | Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | $ 624 | | $ 624 | 627.2 |
Term Loan | Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 632.4 | | 632.4 | 638.1 |
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 | 61.9 | | 61.9 | |
Secured Second A&R CDA [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | 27.2 | | 27.2 | |
Premium/(Discount), Debt | 0 | | 0 | |
Debt Issuance Cost | (0.1) | | (0.1) | |
Book Value | $ 27.1 | | $ 27.1 | |
Average Effective Interest Rate | 7.50% | | 7.50% | |
Unsecured Second A&R CD [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | $ 73.2 | | $ 73.2 | |
Premium/(Discount), Debt | 0 | | 0 | |
Debt Issuance Cost | (0.4) | | (0.4) | |
Book Value | $ 72.8 | | $ 72.8 | |
Average Effective Interest Rate | 7.50% | | 7.50% | |
Lease Financing Obligations [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | $ 267.5 | | $ 267.5 | |
Premium/(Discount), Debt | 0 | | 0 | |
Debt Issuance Cost | (1.2) | | (1.2) | |
Book Value | 266.3 | | 266.3 | |
Debt Instrument, Gross, Current Maturities | (10.5) | | (10.5) | |
Premium/(Discount), Current Maturities | 0 | | 0 | |
Deferred Finance Costs, Current, Net | 0 | | 0 | |
Book Value, Current Maturities | $ (10.5) | | $ (10.5) | |
Average Effective Interest Rate | 12.00% | | 12.00% | |
Lease Financing Obligations [Member] | Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | $ 266.3 | | $ 266.3 | 268.6 |
Lease Financing Obligations [Member] | Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 251.5 | | 251.5 | 259.1 |
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Letters of credit outstanding, amount | 359.2 | | 359.2 | |
Other Debt Obligations [Member] | Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 99.9 | | 99.9 | 101.3 |
Other Debt Obligations [Member] | Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | $ 99.7 | | $ 99.7 | $ 101.8 |
Credit Agreement Amendment, January 31, 2017 | | | | |
Debt Instrument [Line Items] | | | | |
Maximum Total Leverage Ratio, September 30, 2016 | 3.85 | | | |
Maximum Total Leverage Ratio, December 31, 2017 | 3.85 | | | |
Maximum Total Leverage Ratio, March 31, 2017 | 3.75 | | | |
Maximum Total Leverage Ratio, June 30, 2017 | 3.5 | | | |
Maximum Total Leverage Ratio, September 30, 2017 | 3.5 | | | |
Maximum Total Leverage Ratio, December 31, 2017 and thereafter | 3.5 | | | |
Debt Instrument, Covenant, Maximum Total Leverage Ratio, Quarter Seven | 3.25 | | | |
Debt Instrument, Covenant, Maximum Total Leverage Ratio, Quarter Eight | 3.25 | | | |
Credit Agreement Amendment, September 2014 [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Debt Instrument, Total Leverage Ratio | | | 3.62 | |
2014 ABL Facility Credit Agreement [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Amount able to be drawn | $ 19.6 | | | |
2014 ABL Facility Credit Agreement [Member] | Line of Credit [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Line of credit facility, total cash and availability | 202 | | $ 202 | |
Revenue Equipment [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Operating lease commitment | $ 7.1 | | $ 7.1 | |
Operating lease term | 5 years | | | |
London Interbank Offered Rate (LIBOR) [Member] | Term Loan | | | | |
Debt Instrument [Line Items] | | | | |
Floor interest rate | 100.00% | | 100.00% | |
Basis spread on variable rate | 7.50% | | | |
Minimum [Member] | Secured Second A&R CDA [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 4.30% | | 4.30% | |
Minimum [Member] | Unsecured Second A&R CD [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 4.30% | | 4.30% | |
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% | |