Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Stock-based compensation expense	$ 11.7	$ 9.0
Accrued expenses	37.6	42.9
Financing obligations associated with the Master Leases	1,097.6	1,919.7
Unrecognized tax benefits	7.7	6.7
Investments in and advances to unconsolidated affiliates	0.0	3.6
Net operating losses, interest limitation and tax credit carryforwards	87.6	122.8
Gross deferred tax assets	1,242.2	2,104.7
Less: Valuation allowance	(54.2)	(89.5)
Total deferred tax assets	1,188.0	2,015.2
Deferred tax liabilities:
Property and equipment, not subject to the Master Leases	(53.1)	(47.3)
Property and equipment, subject to the Master Leases	(1,088.9)	(1,599.9)
Investments in and advances to unconsolidated affiliates	(2.9)	0.0
Undistributed foreign earnings	(0.4)	(0.4)
Intangible assets	(287.3)	(287.0)
Total deferred tax liabilities	(1,432.6)	(1,934.6)
Long-term deferred tax liabilities, net	$ (244.6)
Long-term deferred tax assets, net		$ 80.6