Variable Interest Entities (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended																		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Loans and Finance Receivables [Member]	Dec. 31, 2013 Loans and Finance Receivables [Member]	Jun. 30, 2014 Investment Securities [Member]	Dec. 31, 2013 Investment Securities [Member]	Jun. 30, 2014 Assets Other [Member]	Dec. 31, 2013 Assets Other [Member]	Jun. 30, 2014 Assets, Total [Member]	Dec. 31, 2013 Assets, Total [Member]	Jun. 30, 2014 Borrowings [Member]	Dec. 31, 2013 Borrowings [Member]	Jun. 30, 2014 Nonrecourse Borrowings [Member]	Dec. 31, 2013 Nonrecourse Borrowings [Member]	Jun. 30, 2014 Liabilities Other [Member]	Dec. 31, 2013 Liabilities Other [Member]	Jun. 30, 2014 Liabilities, Total [Member]	Dec. 31, 2013 Liabilities, Total [Member]	Jun. 30, 2014 Consolidated Variable Interest Entities [Member]	Jun. 30, 2013 Consolidated Variable Interest Entities [Member]	Jun. 30, 2014 Consolidated Variable Interest Entities [Member]	Jun. 30, 2013 Consolidated Variable Interest Entities [Member]	Jun. 30, 2014 Power Generating Activities Entity [Member]	Jun. 30, 2014 Industrial Equipment Joint Venture [Member]	Jun. 30, 2014 Insurance Entities [Member]	Jun. 30, 2014 Trinity [Member] Loans and Finance Receivables [Member]	Dec. 31, 2013 Trinity [Member] Loans and Finance Receivables [Member]	Jun. 30, 2014 Trinity [Member] Investment Securities [Member]	Dec. 31, 2013 Trinity [Member] Investment Securities [Member]	Jun. 30, 2014 Trinity [Member] Assets Other [Member]	Dec. 31, 2013 Trinity [Member] Assets Other [Member]	Jun. 30, 2014 Trinity [Member] Assets, Total [Member]	Dec. 31, 2013 Trinity [Member] Assets, Total [Member]	Jun. 30, 2014 Trinity [Member] Borrowings [Member]	Dec. 31, 2013 Trinity [Member] Borrowings [Member]	Jun. 30, 2014 Trinity [Member] Nonrecourse Borrowings [Member]	Dec. 31, 2013 Trinity [Member] Nonrecourse Borrowings [Member]	Jun. 30, 2014 Trinity [Member] Liabilities Other [Member]	Dec. 31, 2013 Trinity [Member] Liabilities Other [Member]	Jun. 30, 2014 Trinity [Member] Liabilities, Total [Member]	Dec. 31, 2013 Trinity [Member] Liabilities, Total [Member]	Jun. 30, 2014 Trinity [Member] Consolidated Variable Interest Entities [Member]	Dec. 31, 2013 Trinity [Member] Consolidated Variable Interest Entities [Member]	Jun. 30, 2014 Consolidated Securitization Entities [Member]	Dec. 31, 2013 Consolidated Securitization Entities [Member]	Jun. 30, 2014 Other 1 [Member] Loans and Finance Receivables [Member]	Dec. 31, 2013 Other 1 [Member] Loans and Finance Receivables [Member]	Jun. 30, 2014 Other 1 [Member] Investment Securities [Member]	Dec. 31, 2013 Other 1 [Member] Investment Securities [Member]	Jun. 30, 2014 Other 1 [Member] Assets Other [Member]	Dec. 31, 2013 Other 1 [Member] Assets Other [Member]	Jun. 30, 2014 Other 1 [Member] Assets, Total [Member]	Dec. 31, 2013 Other 1 [Member] Assets, Total [Member]	Jun. 30, 2014 Other 1 [Member] Borrowings [Member]	Dec. 31, 2013 Other 1 [Member] Borrowings [Member]	Jun. 30, 2014 Other 1 [Member] Nonrecourse Borrowings [Member]	Dec. 31, 2013 Other 1 [Member] Nonrecourse Borrowings [Member]	Jun. 30, 2014 Other 1 [Member] Liabilities Other [Member]	Dec. 31, 2013 Other 1 [Member] Liabilities Other [Member]	Jun. 30, 2014 Other 1 [Member] Liabilities, Total [Member]	Dec. 31, 2013 Other 1 [Member] Liabilities, Total [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Loans and Finance Receivables [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Loans and Finance Receivables [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Investment Securities [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Investment Securities [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Assets Other [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Assets Other [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Assets, Total [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Assets, Total [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Borrowings [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Borrowings [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Nonrecourse Borrowings [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Nonrecourse Borrowings [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Liabilities Other [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Liabilities Other [Member]	Jun. 30, 2014 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Liabilities, Total [Member]	Dec. 31, 2013 Credit Card Receivable [Member] Consolidated Securitization Entities [Member] Liabilities, Total [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Loans and Finance Receivables [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Loans and Finance Receivables [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Investment Securities [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Investment Securities [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Assets Other [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Assets Other [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Assets, Total [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Assets, Total [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Borrowings [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Borrowings [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Nonrecourse Borrowings [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Nonrecourse Borrowings [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Liabilities Other [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Liabilities Other [Member]	Jun. 30, 2014 Equipment [Member] Consolidated Securitization Entities [Member] Liabilities, Total [Member]	Dec. 31, 2013 Equipment [Member] Consolidated Securitization Entities [Member] Liabilities, Total [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Loans and Finance Receivables [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Loans and Finance Receivables [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Investment Securities [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Investment Securities [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Assets Other [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Assets Other [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Assets, Total [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Assets, Total [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Borrowings [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Borrowings [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Nonrecourse Borrowings [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Nonrecourse Borrowings [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Liabilities Other [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Liabilities Other [Member]	Jun. 30, 2014 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Liabilities, Total [Member]	Dec. 31, 2013 Trade Accounts Receivable [Member] Consolidated Securitization Entities [Member] Liabilities, Total [Member]
Assets And Liabilities Of Consolidated VIEs [Line Items]
Assets VIE					$ 43,876	$ 42,247	$ 3,722	$ 3,830	$ 3,166	$ 2,354	$ 50,764	$ 48,431													$ 711	$ 1,604	$ 1,234	$ 0	$ 0	$ 2,685	$ 2,786	$ 15	$ 213	$ 2,700	$ 2,999													$ 2,732	$ 2,044	$ 1,037	$ 1,044	$ 1,748	$ 1,563	$ 5,517	$ 4,651									$ 25,334	$ 24,766	$ 0	$ 0	$ 732	$ 20	$ 26,066	$ 24,786									$ 13,084	$ 12,928	$ 0	$ 0	$ 669	$ 557	$ 13,753	$ 13,485									$ 2,726	$ 2,509	$ 0	$ 0	$ 2	$ 1	$ 2,728	$ 2,510
Liabilities VIE													563	597	28,651	28,574	3,501	3,218	32,715	32,389					0	707	575									0	0	0	0	1,446	1,482	1,446	1,482													563	597	448	49	1,292	1,235	2,303	1,881									0	0	15,114	15,363	338	228	15,452	15,591									0	0	10,911	10,982	393	248	11,304	11,230									0	0	2,178	2,180	32	25	2,210	2,205
Total revenues of consolidated VIEs	10,247	10,916	20,762	22,384																	1,660	1,669	3,293	3,372
Provision for Loan and Lease Losses	968	1,010	1,938	2,467																	267	175	568	589
Interest Expense	2,071	2,388	4,232	4,770																	88	95	168	184
Commingled cash amounts owed to CSEs																																														3,074	6,314
Commingled cash receivable from CSEs																																														3,121	5,540
Intercompany Advances Eliminated In Consolidation																																												$ 1,490	$ 1,837