Finance and Other Receivables (Detail) (Financial Services, USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 3,989.4	$ 3,977.4
Direct financing leases	2,709.4	2,680.8
Sales-type finance leases	874.6	921.1
Dealer wholesale financing	1,679.2	1,616.5
Operating lease and other trade receivables	112.8	121.3
Unearned interest: Finance leases	(371.5)	(375.7)
Loans and Leases Receivable, Net of Deferred Income, Total	8,993.9	8,941.4
Less allowance for losses	(130.3)	(129.3)		(132.9)	(130.0)
Finance and other receivables, net	8,863.6	8,812.1	[1]
Loans and leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	(111.6)	(110.9)
Dealer | Wholesale
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	(10.8)	(10.4)		(11.8)	(11.8)
Operating lease and other trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Less allowance for losses	$ (7.9)	$ (8.0)

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