Debt - Term Loan due 2027 (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 10, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ 0.0	$ 0.0	$ 0.4	$ 174.0
Term Loan due 2027 at 2.84% and 3.15% at June 30, 2021 and December 31, 2020, respectively. | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate decrease	0.25%
Term Loan due 2027 at 2.84% and 3.15% at June 30, 2021 and December 31, 2020, respectively. | Revolving Credit Facility | Stated Percentage
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Loss on extinguishment of debt				$ 0.4
Term Loan due 2027 at 2.84% and 3.15% at June 30, 2021 and December 31, 2020, respectively. | Revolving Credit Facility | One-, Two-, Three- Or Six-Month LIBOR Or, If Agreed By All Term Lenders, 12-month LIBOR Or, If Agreed To By The Term Agent, Any Shorter Period Selected At The Option Of The Borrower
Debt Instrument [Line Items]
Basis spread on variable rate	2.75%