Cloud Computing Costs (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
Finite-Lived Intangible Assets [Line Items]
Short-term portion	$ 24.1		$ 24.1		$ 18.0
Long-term portion	110.3		110.3		87.1
Total capitalized implementation costs	134.4		134.4		105.1
Less: accumulated amortization	(31.0)		(31.0)		(17.1)
Capitalized implementation costs, net	103.4		103.4		$ 88.0
Capitalized implementation costs, amortization	$ 5.4	$ 3.8	$ 14.7	$ 8.8
Minimum | Cloud Computing Costs
Finite-Lived Intangible Assets [Line Items]
Expected term	3 years		3 years
Maximum | Cloud Computing Costs
Finite-Lived Intangible Assets [Line Items]
Expected term	10 years		10 years