Off-Balance Sheet Lending-Related Financial Instruments, Guarantees and Other Commitments - Standby Letters of Credit and Other Financial Guarantees (Details1) (USD $)						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Standby and Other Letters of Credit [Member]	Dec. 31, 2012 Standby and Other Letters of Credit [Member]	Dec. 31, 2013 Standby letters of credit and other financial guarantees [Member]	Dec. 31, 2012 Standby letters of credit and other financial guarantees [Member]	Dec. 31, 2013 Other letters of credit [Member]	Dec. 31, 2012 Other letters of credit [Member]	Dec. 31, 2013 Derivatives Qualifying As Guarantees [Member]	Dec. 31, 2012 Derivatives Qualifying As Guarantees [Member]
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Standby and other letters of credit, carrying value				$ 945,000,000	$ 649,000,000
Standby and other letters of credit, allowance				265,000,000	284,000,000
Guarantor obligations, current carrying value				680,000,000	365,000,000					72,000,000	42,000,000
Standby Letters of Credit and Other Financial Guarantees, Internal Credit Rating, Investment Grade						69,109,000,000	77,081,000,000	3,939,000,000	3,998,000,000
Standby Letters of Credit and Other Financial Guarantees, Internal Credit Rating, Non Investment Grade						23,614,000,000	23,848,000,000	1,081,000,000	1,575,000,000
Total lending-related commitments	1,031,672,000,000	1,027,988,000,000	975,662,000,000			92,723,000,000	100,929,000,000	5,020,000,000	5,573,000,000
Valuation Allowances and Reserves, Balance						263,000,000	282,000,000	2,000,000	2,000,000
Standby Letters of Credit, Collateral Held						40,410,000,000	42,654,000,000
Other Letters of Credit, Collateral Held								1,473,000,000	1,145,000,000
Percentage of Cash or Liquid Collateral Relative to Value of Securities on Loan						100.00%
Derivatives qualifying as guarantees
Other guarantees and commitments, contractual amount										56,274,000,000	61,738,000,000
Derivative, Notional Amount	70,430,000,000,000	69,328,000,000,000								27,000,000,000	26,500,000,000
Derivatives Maximum Exposure To Loss										2,800,000,000	2,800,000,000
Derivative Qualifying As Guarantees Payables										109,000,000	122,000,000
Derivative Qualifying As Guarantees Receivables										37,000,000	80,000,000
Unsettled forward starting reverse repurchase and securities borrowing agreements	9,900,000,000	13,200,000,000
Unsettled reverse repurchase and securities borrowing agreements with regular way settlement periods	$ 28,300,000,000	$ 21,700,000,000