Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Stock-based compensation expense	$ 10.6	$ 18.2
Accrued expenses	86.2	43.3
Financing and operating leasing obligations	2,351.3	2,336.9
Unrecognized tax benefits	8.9	7.9
Net operating losses, interest limitation and tax credit carryforwards	115.7	153.9
Gross deferred tax assets	2,572.7	2,560.2
Less: Valuation allowance	(124.3)	(101.0)
Net deferred tax assets	2,448.4	2,459.2
Deferred tax liabilities:
Property and equipment, not subject to the Master Leases	(65.6)	(51.1)
Property and equipment, subject to the Master Leases	(992.9)	(1,051.2)
Investments in and advances to unconsolidated affiliates	(6.8)	(27.9)
Discount on convertible notes	(18.1)	(20.9)
Undistributed foreign earnings	0.0	(0.4)
Intangible assets	(284.8)	(183.4)
Lease right of use assets	(1,269.3)	(1,250.6)
Net deferred tax liabilities	(2,637.5)	(2,585.5)
Long-term deferred tax liabilities, net	$ (189.1)	$ (126.3)