Income Taxes - Deferred Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Assets, Net [Abstract]
Allowance for credit losses	$ 22.9	$ 12.6
Financing receivables	0.0	4.6
Operating lease liabilities	10.2	8.7
Inventories	6.3	6.9
Pension benefits	0.6	0.8
Other accruals and prepayments	23.2	25.9
Deferred revenue	9.5	6.3
Warranty services	12.6	12.3
Stock-based compensation expense	6.7	4.3
Tax credit and loss carryforwards	29.0	34.4
Other	4.0	0.0
Valuation allowances	(22.4)	(29.7)
Total deferred tax assets	102.6	87.1
Deferred Tax Liabilities:
Property, plant and equipment	(8.6)	(8.0)
Operating lease right-of-use assets	(9.4)	(8.7)
Insurance, including self-insurance	(18.3)	(78.2)
Goodwill and other intangibles	(66.2)	(75.7)
Other	(4.4)	0.4
Total deferred tax liabilities	(106.9)	(170.2)
Net deferred tax liability	$ (4.3)	$ (83.1)