Finance Receivables Credit Risk Profile by Dealer grouping of Commercial Finance Receivables (Details) (Commercial Finance Receivables, USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	$ 7,108	$ 6,700
Group I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	609	598
Group II
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	1,626	1,588
Group III
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	2,422	2,174
Group IV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	1,680	1,622
Group V
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	543	488
Group VI
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	$ 228	$ 230