Fair Value Measurement - Schedule of Carrying Amounts, Estimated Fair Values and Respective Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	$ 0.0	$ 0.0
Derivative liability	0.0	0.0
Earn-out contingent liability	0.0	0.0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	526.7	499.3
Derivative liability	5.4	0.0
Earn-out contingent liability	0.0	0.0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	0.0	0.0
Derivative liability	0.0	0.0
Earn-out contingent liability	2.6	2.6
Carrying Amount
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	526.7	499.3
Derivative liability	5.4	0.0
Earn-out contingent liability	2.6	2.6
Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt	526.7	499.3
Derivative liability	5.4	0.0
Earn-out contingent liability	$ 2.6	$ 2.6