Finance and Other Receivables (Detail) - Financial Services - USD ($) $ in Millions		Sep. 30, 2016	Dec. 31, 2015		Sep. 30, 2015	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 3,980.2	$ 4,011.7
Direct financing leases		2,759.4	2,719.5
Sales-type finance leases		875.9	969.8
Dealer wholesale financing		1,764.0	1,950.1
Operating lease receivables and other		150.3	131.9
Unearned interest: Finance leases		(337.1)	(364.6)
Finance and other receivables, net of deferred income		9,192.7	9,418.4
Less allowance for losses		(114.4)	(114.8)		$ (118.0)	$ (122.0)
Finance and other receivables, net		9,078.3	9,303.6	[1]
Loans And Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(99.5)	(99.2)
Dealer | Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(6.5)	(7.3)		(8.4)	(9.0)
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	[2]	$ (8.4)	$ (8.3)		$ (9.5)	$ (7.5)

[1] The December 31, 2015 consolidated balance sheet has been derived from audited financial statements.

[2] Operating leases and other trade receivables.