Business Combinations - Contingent Consideration Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Contingent Consideration
Balance at December 31, 2021			$ 21.2
Decrease in fair value of contingent consideration liabilities			(1.0)
Balance at June 30, 2022	$ 20.2		20.2
SES
Contingent Consideration
Balance at December 31, 2021			19.1
Decrease in fair value of contingent consideration liabilities	(0.3)	$ 1.3	(0.8)	$ 2.0
Balance at June 30, 2022	18.3		18.3
BIG
Contingent Consideration
Balance at December 31, 2021			2.1
Decrease in fair value of contingent consideration liabilities	0.1	$ (0.1)	(0.2)
Balance at June 30, 2022	$ 1.9		$ 1.9