Fair Value Measurements - Schedule of Fair Value of Hedges (Details) - Interest rate swap - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability, fair value	$ 0.2	$ 6.9
Accrued liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability, fair value	0.2	6.7
Other long-term liabilities
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability, fair value	$ 0.0	$ 0.2