Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of the period	$ 86.6	$ 33.9	$ 19.5
Increases related to current period tax positions	42.0	26.7	14.5
Increases related to prior period tax positions	19.9	26.7	0.6
Decreases related to prior period tax positions	0.0	0.0	(0.2)
Settlement with tax authorities	0.0	0.0	(0.5)
Statute of limitations expiration	(1.3)	(0.7)	0.0
Balance at end of period	147.2	86.6	33.9
Unrecognized tax benefits	147.2	86.6	33.9
Net unrecognized tax benefits which would affect the tax rate if recognized	129.5	$ 75.8	$ 33.9
Deferred Tax Assets
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at end of period	14.4
Unrecognized tax benefits	14.4
Accounts Payable and Accrued Liabilities
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at end of period	132.8
Unrecognized tax benefits	$ 132.8