Quarterly report pursuant to Section 13 or 15(d)

Securities Financing Transactions Offsetting Assets (Details)

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Securities Financing Transactions Offsetting Assets (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Securities Financing Transactions Disclosures [Abstract]    
Receivables under resale agreements, gross assets $ 253,755 $ 276,275
Receivables under resale agreements, amounts offset (109,269) (127,458)
Receivables under resale agreements, net balance sheet amount 144,486 148,817
Receivables under resale agreements, financial instruments (138,345) (138,577)
Receivables under resale agreements, net asset 6,141 10,240
Receivables under securities borrowed transactions, gross assets 80,810 71,309
Receivables under securities borrowed transactions, amounts offset (16,021) (10,317)
Receivables under securities borrowed transactions, net balance sheet amount 64,789 60,992
Receivables under securities borrowed transactions, financial instruments (44,647) (43,714)
Receivables under securities borrowed transactions, net asset 20,142 17,278
Total, gross assets 334,565 347,584
Total, amounts offset 125,290 137,775
Total, net balance sheet amount 209,275 209,809
Total, financial instruments 182,992 182,291
Total, net asset $ 26,283 $ 27,518