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Income Taxes - Deferred Tax Asset and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred income tax assets:    
Net operating loss $ 57.6 $ 61.8
Property, net 6.6 33.9
Insurance reserve 17.8 17.0
Stock-based compensation 15.2 38.3
Operating lease liabilities 22.1 30.6
Other accruals 43.4 23.4
Tax credits 10.5 6.8
Other 0.1 0.2
Total deferred income tax assets 173.3 212.0
Less: Valuation allowance (46.2) (38.4)
Net deferred income tax assets 127.1 173.6
Deferred income tax liabilities:    
Revenue reserves (5.7) (11.6)
Intangibles (99.7) (94.6)
Operating lease right-of-use assets (21.7) (30.3)
Carrying value of partnerships (51.4) (34.0)
Other (0.4) (0.2)
Total deferred income tax liabilities (178.9) (170.7)
Net deferred income tax (liabilities) assets $ (51.8)  
Net deferred income tax (liabilities) assets   $ 2.9