Income Taxes - Accounting for Uncertainty in Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 606.4	$ 563.4	$ 75.7
Additions based on tax positions related to the current period	5.2	36.3	4.2
Additions for tax positions of prior periods	60.2	23.4	509.9
Reductions for tax positions of prior periods	(485.0)	(14.9)	(18.8)
Statute expirations	(2.1)	(1.6)	(3.2)
Settlement payment	(11.3)	(0.2)	(4.4)
Ending balance	$ 173.4	$ 606.4	$ 563.4