Tax Effects of Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets:
Accrued liabilities	$ 252.2	$ 210.9
R&D expense capitalization	153.6	0.0
Net operating loss and tax credit carryforwards	128.0	124.9
Inventory adjustments	59.5	0.0
Allowance for losses on receivables	43.8	36.5
Unrealized investment loss	16.5	0.8
Other	79.1	71.1
Deferred Tax Assets, Gross, Total	732.7	444.2
Valuation allowance	(116.2)	(109.3)
Deferred Tax Assets, Net of Valuation Allowance, Total	(616.5)	(334.9)
Liabilities:
Financial Services leasing depreciation	(558.9)	(547.1)
Depreciation and amortization	(227.3)	(166.8)
Postretirement benefit plans	(120.5)	(86.5)
Inventory adjustments	0.0	(11.5)
Other	(59.2)	(33.2)
Deferred Tax Liability, Total	(965.9)	(845.1)
Net deferred tax liability	$ (349.4)	$ (510.2)