TDRs Modified During Previous Twelve Months that Subsequently Defaulted (Detail) (Financial Services, USD $) In Millions, unless otherwise specified	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Recorded Investment, subsequently defaulted	$ 2.5	$ 2.7
Customer Retail \| Fleet
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Recorded Investment, subsequently defaulted	1.6	2.5
Customer Retail \| Owner/Operator
Troubled Debt Restructuring, Debtor, Subsequent Periods [Line Items]
Recorded Investment, subsequently defaulted	$ 0.9	$ 0.2

Amount of investment related to financing receivables modified by troubled debt restructurings within the previous 12 months, for which there was a payment default.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 34

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953682-111524

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration