Finance and Other Receivables (Detail) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	[1]
Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 7,229.1	$ 6,424.7
Finance leases		3,786.4	3,620.6
Dealer wholesale financing		2,772.1	1,865.8
Operating lease receivables and other		125.4	126.6
Finance and other receivables, net of deferred income		13,913.0	12,037.7
Less allowance for losses		(121.1)	(116.9)	$ (127.0)	$ (118.6)
Finance and other receivables, net		13,791.9	11,920.8
Loans and Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(114.8)	(111.5)
Dealer | Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(3.4)	(3.3)
Dealer | Wholesale | Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(3.4)	(3.3)	(3.4)	(4.3)
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(2.9)	(2.1)
Other | Financial Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	[2]	$ (2.9)	$ (2.1)	$ (3.2)	$ (3.7)

[1] The beginning balance has been adjusted for the adoption of ASU 2016-13

[2] Operating lease and other trade receivables.