Finance and Other Receivables (Detail) (Financial Services, USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013		Sep. 30, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 3,944.1	$ 3,977.4
Direct financing leases	2,762.5	2,680.8
Sales-type finance leases	905.2	921.1
Dealer wholesale financing	1,643.0	1,616.5
Operating lease and other trade receivables	103.3	121.3
Unearned interest: Finance leases	(377.6)	(375.7)
Loans and Leases Receivable, Net of Deferred Income, Total	8,980.5	8,941.4
Less allowance for losses	(127.9)	(129.3)		(131.7)	(130.0)
Finance and other receivables, net	8,852.6	8,812.1	[1]
Loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	(109.8)	(110.9)
Dealer | Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	(10.1)	(10.4)		(10.9)	(11.8)
Operating lease and other trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	$ (8.0)	$ (8.0)

[1] The December 31, 2013 consolidated balance sheet has been derived from audited financial statements.