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
Jun. 30, 2013
Dec. 31, 2012
Securities Financing Transactions Disclosures [Abstract]    
Receivables under resale agreements, gross assets $ 217,062 $ 276,275
Receivables under resale agreements, amounts offset (74,745) (127,458)
Receivables under resale agreements, net balance sheet amount 142,317 148,817
Receivables under resale agreements, financial instruments (112,136) (121,422)
Receivables under resale agreements, net asset 30,181 27,395
Receivables under securities borrowed transactions, gross assets 93,591 71,309
Receivables under securities borrowed transactions, amounts offset (19,792) (10,317)
Receivables under securities borrowed transactions, net balance sheet amount 73,799 60,992
Receivables under securities borrowed transactions, financial instruments (54,917) (43,660)
Receivables under securities borrowed transactions, net asset 18,882 17,332
Total, gross assets 310,653 347,584
Total, amounts offset 94,537 137,775
Total, net balance sheet amount 216,116 209,809
Total, financial instruments 167,053 165,082
Total, net asset $ 49,063 $ 44,727