Finance and Other Receivables (Detail) - Financial Services - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014		Jun. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans		$ 3,960.9	$ 3,968.5
Direct financing leases		2,722.6	2,752.8
Sales-type finance leases		933.8	972.8
Dealer wholesale financing		2,055.9	1,755.8
Operating lease receivables and other		131.2	99.5
Unearned interest: Finance leases		(371.0)	(384.8)
Loans and Leases Receivable, Net of Deferred Income, Total		9,433.4	9,164.6
Less allowance for losses		(120.3)	(122.0)		$ (131.1)	$ (129.3)
Finance and other receivables, net		9,313.1	9,042.6	[1]
Loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(102.7)	(105.5)
Dealer | Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses		(8.7)	(9.0)		(10.2)	(10.4)
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	[2]	$ (8.9)	$ (7.5)		$ (7.7)	$ (8.0)

[1] The December 31, 2014 consolidated balance sheet has been derived from audited financial statements.

[2] Operating leases and other trade receivables.