Discontinued and Held-for-sale Operations (Selected Income Statement Information for Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest in Joint Venture	40.00%
Mortgage Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total net (loss) revenue - Discontinued Operations	$ 0	$ 0
Pretax income (loss) including direct costs to transact a sale	(2)	(20)
Tax (benefit) expense - Discontinued Operations	0	16
Insurance Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total net (loss) revenue - Discontinued Operations	0	148
Pretax income (loss) including direct costs to transact a sale	0	28
Tax (benefit) expense - Discontinued Operations	0	1
Automotive finance operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total net (loss) revenue - Discontinued Operations	33	286
Pretax income (loss) including direct costs to transact a sale	30	1,042
Tax (benefit) expense - Discontinued Operations	(1)	(1)
Commercial Finance Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total net (loss) revenue - Discontinued Operations	0	0
Pretax income (loss) including direct costs to transact a sale	0	(1)
Tax (benefit) expense - Discontinued Operations	$ 0	$ 0