Accumulated Other Comprehensive Income - Components of AOCI (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Equity [Abstract]
Foreign currency translation, Gross Balance	$ 11.7	$ 17.9	$ 2.2	$ 3.5	$ (6.2)	$ (0.5)
Foreign currency translation, Tax Effect	0.0	0.0
Foreign currency translation, Net Balance	11.7	17.9
Unrealized gain (loss) on interest rate swaps, Gross Balance	(6.7)	(9.9)	$ 0.6	$ (1.6)	$ 3.2	$ (11.7)
Unrealized gain (loss) on interest rate swaps, Tax Effect	(1.9)	(2.7)
Unrealized gain (loss) on interest rate swaps, Net Balance	(4.8)	(7.2)
Total, Gross Balance	5.0	8.0
Total, Tax Effect	(1.9)	(2.7)
Total, Net Balance	$ 6.9	$ 10.7