Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Deferred revenue and cancellation reserves	$ 48.4	$ 47.2
Allowances and accruals, including state tax carryforward amounts	42.1	40.8
Lease Liability	69.7	0.0
Credits and other	0.3	0.3
Valuation allowance	(0.6)	(1.1)
Total deferred tax assets	159.9	87.2
Deferred tax liabilities:
Inventories	(40.0)	(42.0)
Goodwill	(60.7)	(48.2)
Property and equipment, principally due to differences in depreciation	(113.6)	(78.0)
Right of Use Asset	(66.6)
Prepaid expenses and other	(10.1)	(10.2)
Total deferred tax liabilities	(291.0)	(178.4)
Total	$ (131.1)	$ (91.2)