Tax Effects of Temporary Differences Representing Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Assets:
Accrued liabilities	$ 314.3	$ 252.2
R&D expense capitalization	257.1	153.6
Net operating loss and tax credit carryforwards	144.8	128.0
Inventory adjustments	64.6	59.5
Allowance for losses on receivables	53.2	43.8
Other	132.2	95.6
Deferred Tax Assets, Gross, Total	966.2	732.7
Valuation allowance	(2.3)	(116.2)
Deferred Tax Assets, Net of Valuation Allowance, Total	963.9	616.5
Liabilities:
Financial Services leasing depreciation	(572.6)	(558.9)
Depreciation and amortization	(219.7)	(227.3)
Postretirement benefit plans	(144.5)	(120.5)
Other	(58.9)	(59.2)
Deferred Tax Liability, Total	(995.7)	(965.9)
Net deferred tax liability	$ (31.8)	$ (349.4)