Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Deferred gains and other long-term liabilities
Recurring basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 1,346.4	$ 1,333.5
Restricted cash	119.4	95.4
Short-term investment securities	107.1	106.3
Assets held for sale	2.5	2.5
Total assets	1,575.4	1,537.7
Derivative liability	29.2
Total liabilities	29.2	0.0
Recurring basis | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	1,346.4	1,333.5
Restricted cash	119.4	95.4
Short-term investment securities	107.1	106.3
Assets held for sale	0.0	0.0
Total assets	1,572.9	1,535.2
Derivative liability	0.0
Total liabilities	0.0	0.0
Recurring basis | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0.0	0.0
Restricted cash	0.0	0.0
Short-term investment securities	0.0	0.0
Assets held for sale	0.0	0.0
Total assets	0.0	0.0
Derivative liability	29.2
Total liabilities	29.2	0.0
Recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	0.0	0.0
Restricted cash	0.0	0.0
Short-term investment securities	0.0	0.0
Assets held for sale	2.5	2.5
Total assets	2.5	2.5
Derivative liability	0.0
Total liabilities	$ 0.0	$ 0.0