Finance Receivables Credit Risk Profile by Dealer grouping of Commercial Finance Receivables (Details) (Commercial Finance Receivables, 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]
Financing Receivable, Gross	$ 7,151	$ 6,700	$ 5,246	$ 560
Group I
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	711	598
Group II
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	1,732	1,588
Group III
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	2,606	2,174
Group IV
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	1,315	1,622
Group V
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	604	488
Group VI
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	$ 183	$ 230