Debt and Financing (Details) $ in Millions | 9 Months Ended | 12 Months Ended | |
Sep. 30, 2017USD ($) | Sep. 30, 2016USD ($) | Mar. 31, 2017 | Dec. 31, 2016USD ($) |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | $ 962.4 | | | |
Premium/(Discount), Debt | (11) | | | |
Debt Issuance Cost | (9.9) | | | |
Book Value | 941.5 | | | |
Book Value, Current Maturities | (28.5) | | | $ (16.8) |
Par Value, Excluding Current Maturities | 933.9 | | | |
Premium (Discount) | (11) | | | |
Book Value, Excluding Current Maturities | 913 | | | 980.3 |
Operating leases, future minimum payments due | 282.5 | | | |
Acquisition of property and equipment | (70.8) | $ (75.4) | | |
Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 941.5 | | | 997.1 |
Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 901.8 | | | 999 |
Term Loan | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | 599.1 | | | |
Premium/(Discount), Debt | (11) | | | |
Debt Issuance Cost | (8.5) | | | |
Book Value | 579.6 | | | |
Debt Instrument, Gross, Current Maturities | (17) | | | |
Premium/(Discount), Current Maturities | 0 | | | |
Deferred Finance Costs, Current, Net | 0 | | | |
Book Value, Current Maturities | $ (17) | | | |
Stated Interest Rate | 9.735% | | | |
Average Effective Interest Rate | 10.10% | | | |
Term Loan | Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | $ 579.6 | | | 627.2 |
Term Loan | Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 590.8 | | | 638.1 |
Line of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | 0 | | | |
Premium/(Discount), Debt | 0 | | | |
Debt Issuance Cost | 0 | | | |
Book Value | 0 | | | |
Line of credit facility, total cash and availability | 94 | | | |
Secured Second A&R CDA [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | 26.9 | | | |
Premium/(Discount), Debt | 0 | | | |
Debt Issuance Cost | (0.1) | | | |
Book Value | $ 26.8 | | | |
Average Effective Interest Rate | 7.50% | | | |
Unsecured Second A&R CD [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | $ 73.2 | | | |
Premium/(Discount), Debt | 0 | | | |
Debt Issuance Cost | (0.3) | | | |
Book Value | $ 72.9 | | | |
Average Effective Interest Rate | 7.50% | | | |
Lease Financing Obligations [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Gross | $ 263.2 | | | |
Premium/(Discount), Debt | 0 | | | |
Debt Issuance Cost | (1) | | | |
Book Value | 262.2 | | | |
Debt Instrument, Gross, Current Maturities | (11.5) | | | |
Premium/(Discount), Current Maturities | 0 | | | |
Deferred Finance Costs, Current, Net | 0 | | | |
Book Value, Current Maturities | $ (11.5) | | | |
Average Effective Interest Rate | 12.00% | | | |
Lease Financing Obligations [Member] | Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | $ 262.2 | | | 268.6 |
Lease Financing Obligations [Member] | Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 212.3 | | | 259.1 |
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Letters of credit outstanding, amount | 356 | | | |
Other Debt Obligations [Member] | Carrying Amount [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | 99.7 | | | 101.3 |
Other Debt Obligations [Member] | Fair Value [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Long-term Debt, Fair Value | $ 98.7 | | | $ 101.8 |
Credit Agreement Amendment, September 2014 | | | | |
Debt Instrument [Line Items] | | | | |
Debt Instrument, Total Leverage Ratio | | | 3.52 | |
Credit Agreement Amendment, January 31, 2017 | | | | |
Debt Instrument [Line Items] | | | | |
Maximum Total Leverage Ratio, September 30, 2017 | 3.75 | | | |
Maximum Total Leverage Ratio, December 31, 2017 | 3.50 | | | |
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 | | | |
2014 ABL Facility Credit Agreement [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Maximum borrowing capacity (Managed Accessibility) | $ 49 | | | |
2014 ABL Facility Credit Agreement [Member] | Line of Credit [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Line of credit facility, total cash and availability | 209.8 | | | |
Revenue Equipment [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Operating leases, future minimum payments due | $ 26.2 | | | |
Operating lease term | 5 years | | | |
London Interbank Offered Rate (LIBOR) | Term Loan | | | | |
Debt Instrument [Line Items] | | | | |
Floor interest rate | 1.00% | | | |
Basis spread on variable rate | 8.50% | | | |
Minimum [Member] | Secured Second A&R CDA [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 4.30% | | | |
Minimum [Member] | Unsecured Second A&R CD [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 4.30% | | | |
Minimum [Member] | Lease Financing Obligations [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 9.00% | | | |
Maximum [Member] | Secured Second A&R CDA [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 18.30% | | | |
Maximum [Member] | Unsecured Second A&R CD [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 18.30% | | | |
Maximum [Member] | Lease Financing Obligations [Member] | | | | |
Debt Instrument [Line Items] | | | | |
Stated Interest Rate | 18.20% | | | |