Variable Interest Entities (Unconsolidated Variable Interest Entities) (Details) (USD $) In Millions, unless otherwise specified				1 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Unconsolidated VIEs [Member]	Jan. 31, 2013 PTL [Member]	Dec. 31, 2012 PTL [Member]	Dec. 31, 2012 PTL [Member] Investment in Unconsolidated VIEs [Member]	Dec. 31, 2011 PTL [Member] Investment in Unconsolidated VIEs [Member]	Dec. 31, 2012 All Other [Member] Investment in Unconsolidated VIEs [Member]	Dec. 31, 2011 All Other [Member] Investment in Unconsolidated VIEs [Member]	Dec. 31, 2012 Total [Member] Investment in Unconsolidated VIEs [Member]	Dec. 31, 2011 Total [Member] Investment in Unconsolidated VIEs [Member]
Variable Interest Entity [Line Items]
Outstanding Debt Paid By Limited Partner To Company Financed Through Third Parties And Recapitalization						$ 5,392
Partnership interest					825
Loans and advances					1,218
Amount Of Outstanding Debt Repaid By Variable Interest Entity To Finance Subsidiary				repaid all
Real Estate Investments, Net			2,639
Debt Investment Fund			5,030
Factored Receivables			2,218
Other assets and investment securities						2,080	7,038	8,306	7,318	10,386	14,356
Financing receivables	268,951	288,847				0	0	2,654	2,507	2,654	2,507
Total investment						2,080	7,038	10,960	9,825	13,040	16,863
Contractual obligations to fund new investments or guarantees						140	600	2,462	2,244	2,602	2,844
Revolving lines of credit						0	1,356	41	92	41	1,448
Total		$ 21,155				$ 2,220	$ 8,994	$ 13,463	$ 12,161	$ 15,683