Consolidated Balance Sheet & Mini Balance Sheet - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Assets [Abstract]
Cash and Due from Banks	$ 1,779	$ 2,148
Interest-bearing Deposits in Banks and Other Financial Institutions	2,510	4,232
Cash and Cash Equivalents, at Carrying Value	4,289	6,380
Available-for-sale securities	17,701	17,157
Held-to-maturity securities	649	0
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group	56	105
Finance receivables and loans, net [Abstract]
Loans and Leases Receivable, Gross	114,959	111,600
Loans and Leases Receivable, Allowance	(1,134)	(1,054)
Loans and Leases Receivable, Net Amount	113,825	110,546
Property Subject to or Available for Operating Lease, Net	12,689	16,271
Premiums receivable and other insurance assets	1,881	1,801
Other assets	6,307	6,321
Assets	157,397	158,581
Liabilities and Equity [Abstract]
Noninterest-bearing deposit liabilities	101	89
Interest-bearing deposit liabilities	75,643	66,389
Deposits	75,744	66,478
Short-term Debt	6,434	8,101
Long-term debt	56,836	66,234
Interest payable	462	350
Unearned Premiums	2,493	2,434
Accounts Payable and Accrued Liabilities	1,798	1,545
Liabilities	143,767	145,142
Equity [Abstract]
Common Stocks, Including Additional Paid in Capital, Net of Discount	21,149	21,100
Non U S Dept Of Treasury Held Preferred Stock And APIC	0	696
Retained Earnings (Accumulated Deficit)	(7,361)	(8,110)
Accumulated Other Comprehensive Income (Loss), Net of Tax	31	(231)
Treasury stock, Value	(189)	(16)
Stockholders' Equity Attributable to Parent, Total	13,630	13,439
Liabilities and Equity	157,397	158,581
Variable Interest Entity, Primary Beneficiary [Member]
Finance receivables and loans, net [Abstract]
Loans and Leases Receivable, Gross	26,009	27,929
Loans and Leases Receivable, Allowance	(193)	(196)
Loans and Leases Receivable, Net Amount	25,816	27,733
Property Subject to or Available for Operating Lease, Net	2,337	4,791
Other assets	1,189	1,624
Assets	29,342	34,148
Liabilities and Equity [Abstract]
Long-term debt	15,985	20,267
Accounts Payable and Accrued Liabilities	14	22
Liabilities	$ 15,999	$ 20,289