Acquisitions and Dispositions (MetLife Bank Disposition - Narrative) (Details) (MetLife Bank [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jan. 11, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets related to sale of business					$ 6,400,000,000
Net consideration paid					6,400,000,000
Gain (loss) on disposal	(15,000,000)	(117,000,000)	(74,000,000)	(110,000,000)
Minimum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional charges expected related to the exit of business			65,000,000
Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Additional charges expected related to the exit of business			$ 90,000,000