Revenue From Contracts With Customers - Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Contract assets	$ 4.9		$ 4.9		$ 6.3
Credit losses on contract assets	0.0	$ 0.0	0.0	$ 0.0
Contract liabilities	18.6		18.6		10.0
Revenue recognized	15.2	2.7	8.4	7.0
Deferred contract costs	31.3		31.3		$ 20.4
Amortization of deferred contract costs	$ 13.7	$ 8.5	$ 32.8	$ 19.7