Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Deferred tax assets
Net operating loss carry forwards and tax credits	$ 20.8		$ 21.6
Lease liability	119.5		0.0
Accrued expenses	15.0		17.4
Accrued compensation	9.2		7.1
Unfavorable acquired lease contracts			6.4
Other	1.4		0.9
Total gross deferred tax assets	165.9		53.4
Valuation allowances	(8.3)		(8.1)
Total deferred tax assets	157.6		45.3
Deferred tax liabilities
Prepaid expenses	(0.1)		(0.1)
Right of use asset	114.9		0.0
Undistributed foreign earnings	0.0		(0.1)
Depreciation and amortization	(0.7)		1.3
Goodwill amortization	(26.2)		(22.3)
Goodwill amortization			(4.6)
Equity investments in unconsolidated entities	(5.1)		(4.9)
Total deferred tax liabilities	(147.0)		(30.7)
Net deferred tax asset	$ 10.6	$ 14.6	$ 14.6