v2.4.0.6
Derivative Instruments and Hedging Activities (Notional and Fair Value of Protection Sold and Purchased through Credit Default Swaps) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount $ 2,161,937 $ 2,438,011
Credit risk derivative liabilities, fair value 54,920 [1],[2] 92,483 [1],[2]
Protection Sold | Less than 1 Year
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 522,619 487,685
Protection Sold | 1 - 3 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 681,792 831,042
Protection Sold | 3 - 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 737,969 788,074
Protection Sold | Over 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 219,557 331,210
Credit Default Swaps | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 2,157,553 2,432,404
Credit risk derivative liabilities, fair value 56,664 [1],[2] 93,629 [1],[2]
Credit Default Swaps | Protection Sold | Less than 1 Year
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 521,915 487,620
Credit Default Swaps | Protection Sold | 1 - 3 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 681,228 828,686
Credit Default Swaps | Protection Sold | 3 - 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 737,154 787,357
Credit Default Swaps | Protection Sold | Over 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 217,256 328,741
Credit Default Swaps | Protection Purchased
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 2,144,996 2,462,261
Credit risk derivative assets, fair value (61,912) (101,694)
Single Name Credit Default Swaps | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 1,180,417 1,325,045
Credit risk derivative liabilities, fair value 26,932 [1],[2] 47,045 [1],[2]
Single Name Credit Default Swaps | Protection Sold | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 37,390 44,000
Credit risk derivative liabilities, fair value 883 [1],[2] 1,536 [1],[2]
Single Name Credit Default Swaps | Protection Sold | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 56,903 68,786
Credit risk derivative liabilities, fair value 303 [1],[2] 1,597 [1],[2]
Single Name Credit Default Swaps | Protection Sold | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 281,731 324,972
Credit risk derivative liabilities, fair value 4,949 [1],[2] 8,683 [1],[2]
Single Name Credit Default Swaps | Protection Sold | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 505,973 529,517
Credit risk derivative liabilities, fair value 4,003 [1],[2] 4,789 [1],[2]
Single Name Credit Default Swaps | Protection Sold | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 298,420 357,770
Credit risk derivative liabilities, fair value 16,794 [1],[2] 30,440 [1],[2]
Single Name Credit Default Swaps | Protection Sold | Less than 1 Year
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 312,770 306,743
Single Name Credit Default Swaps | Protection Sold | Less than 1 Year | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 1,933 1,290
Single Name Credit Default Swaps | Protection Sold | Less than 1 Year | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 10,304 12,416
Single Name Credit Default Swaps | Protection Sold | Less than 1 Year | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 75,045 67,344
Single Name Credit Default Swaps | Protection Sold | Less than 1 Year | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 141,081 131,588
Single Name Credit Default Swaps | Protection Sold | Less than 1 Year | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 84,407 94,105
Single Name Credit Default Swaps | Protection Sold | 1 - 3 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 411,967 504,298
Single Name Credit Default Swaps | Protection Sold | 1 - 3 Years | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 5,849 5,681
Single Name Credit Default Swaps | Protection Sold | 1 - 3 Years | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 14,727 22,043
Single Name Credit Default Swaps | Protection Sold | 1 - 3 Years | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 98,321 124,445
Single Name Credit Default Swaps | Protection Sold | 1 - 3 Years | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 187,707 218,262
Single Name Credit Default Swaps | Protection Sold | 1 - 3 Years | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 105,363 133,867
Single Name Credit Default Swaps | Protection Sold | 3 - 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 336,200 330,454
Single Name Credit Default Swaps | Protection Sold | 3 - 5 Years | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 19,634 24,087
Single Name Credit Default Swaps | Protection Sold | 3 - 5 Years | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 23,726 23,341
Single Name Credit Default Swaps | Protection Sold | 3 - 5 Years | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 76,287 85,543
Single Name Credit Default Swaps | Protection Sold | 3 - 5 Years | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 135,210 115,320
Single Name Credit Default Swaps | Protection Sold | 3 - 5 Years | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 81,343 82,163
Single Name Credit Default Swaps | Protection Sold | Over 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 119,480 183,550
Single Name Credit Default Swaps | Protection Sold | Over 5 Years | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 9,974 12,942
Single Name Credit Default Swaps | Protection Sold | Over 5 Years | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 8,146 10,986
Single Name Credit Default Swaps | Protection Sold | Over 5 Years | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 32,078 47,640
Single Name Credit Default Swaps | Protection Sold | Over 5 Years | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 41,975 64,347
Single Name Credit Default Swaps | Protection Sold | Over 5 Years | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 27,307 47,635
Single Name Credit Default Swaps | Protection Purchased
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 1,149,999 1,315,333
Credit risk derivative assets, fair value (24,814) (45,345)
Total Index and Basket Credit Default Swaps | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 977,136 [3] 1,107,359 [3]
Credit risk derivative liabilities, fair value 29,732 [1],[2],[3] 46,584 [1],[2],[3]
Total Index and Basket Credit Default Swaps | Protection Sold | Less than 1 Year
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 209,145 [3] 180,877 [3]
Total Index and Basket Credit Default Swaps | Protection Sold | 1 - 3 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 269,261 [3] 324,388 [3]
Total Index and Basket Credit Default Swaps | Protection Sold | 3 - 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 400,954 [3] 456,903 [3]
Total Index and Basket Credit Default Swaps | Protection Sold | Over 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 97,776 [3] 145,191 [3]
Index and Basket Credit Default Swaps | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 648,157 787,228
Credit risk derivative liabilities, fair value 17,996 29,475
Index and Basket Credit Default Swaps | Protection Sold | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 188,602 [3] 150,806 [3]
Credit risk derivative assets, fair value (1,063) [1],[2],[3] (907) [1],[2],[3]
Index and Basket Credit Default Swaps | Protection Sold | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 39,876 [3] 47,176 [3]
Credit risk derivative liabilities, fair value 740 [1],[2],[3] 1,053 [1],[2],[3]
Index and Basket Credit Default Swaps | Protection Sold | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 48,980 [3] 53,880 [3]
Credit risk derivative liabilities, fair value 2,585 [1],[2],[3] 2,470 [1],[2],[3]
Index and Basket Credit Default Swaps | Protection Sold | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 336,028 [3] 375,474 [3]
Credit risk derivative liabilities, fair value 4,861 [1],[2],[3] 8,365 [1],[2],[3]
Index and Basket Credit Default Swaps | Protection Sold | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 363,650 [3] 480,023 [3]
Credit risk derivative liabilities, fair value 22,609 [1],[2],[3] 35,603 [1],[2],[3]
Index and Basket Credit Default Swaps | Protection Sold | Less than 1 Year | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 73,314 [3] 48,115 [3]
Index and Basket Credit Default Swaps | Protection Sold | Less than 1 Year | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 4,525 [3] 6,584 [3]
Index and Basket Credit Default Swaps | Protection Sold | Less than 1 Year | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 6,115 [3] 5,202 [3]
Index and Basket Credit Default Swaps | Protection Sold | Less than 1 Year | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 33,683 [3] 8,525 [3]
Index and Basket Credit Default Swaps | Protection Sold | Less than 1 Year | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 91,508 [3] 112,451 [3]
Index and Basket Credit Default Swaps | Protection Sold | 1 - 3 Years | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 50,652 [3] 49,997 [3]
Index and Basket Credit Default Swaps | Protection Sold | 1 - 3 Years | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 13,256 [3] 15,349 [3]
Index and Basket Credit Default Swaps | Protection Sold | 1 - 3 Years | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 6,440 [3] 18,996 [3]
Index and Basket Credit Default Swaps | Protection Sold | 1 - 3 Years | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 101,638 [3] 99,004 [3]
Index and Basket Credit Default Swaps | Protection Sold | 1 - 3 Years | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 97,275 [3] 141,042 [3]
Index and Basket Credit Default Swaps | Protection Sold | 3 - 5 Years | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 49,310 [3] 33,584 [3]
Index and Basket Credit Default Swaps | Protection Sold | 3 - 5 Years | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 7,910 [3] 9,498 [3]
Index and Basket Credit Default Swaps | Protection Sold | 3 - 5 Years | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 34,045 [3] 17,396 [3]
Index and Basket Credit Default Swaps | Protection Sold | 3 - 5 Years | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 171,423 [3] 235,888 [3]
Index and Basket Credit Default Swaps | Protection Sold | 3 - 5 Years | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 138,266 [3] 160,537 [3]
Index and Basket Credit Default Swaps | Protection Sold | Over 5 Years | AAA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 15,326 [3] 19,110 [3]
Index and Basket Credit Default Swaps | Protection Sold | Over 5 Years | AA
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 14,185 [3] 15,745 [3]
Index and Basket Credit Default Swaps | Protection Sold | Over 5 Years | A
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 2,380 [3] 12,286 [3]
Index and Basket Credit Default Swaps | Protection Sold | Over 5 Years | BBB
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 29,284 [3] 32,057 [3]
Index and Basket Credit Default Swaps | Protection Sold | Over 5 Years | Non-investment Grade
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 36,601 [3] 65,993 [3]
Index and Basket Credit Default Swaps | Protection Purchased
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 498,966 601,452
Credit risk derivative assets, fair value (15,738) (24,373)
Tranched Index and Basket Credit Default Swaps | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 328,979 320,131
Credit risk derivative liabilities, fair value 11,736 17,109
Tranched Index and Basket Credit Default Swaps | Protection Purchased
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 496,031 545,476
Credit risk derivative assets, fair value (21,360) (31,976)
Single Name, and Non-tranched Index and Basket Credit Default Swaps | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 1,800,000 2,100,000
Single Name, and Non-tranched Index and Basket Credit Default Swaps | Protection Purchased
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 1,700,000 1,900,000
Other Contracts | Protection Sold
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 4,384 [4],[5] 5,607 [4],[5]
Credit risk derivative assets, fair value (1,744) [1],[2],[4],[5] (1,146) [1],[2],[4],[5]
Other Contracts | Protection Sold | Less than 1 Year
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 704 [4],[5] 65 [4],[5]
Other Contracts | Protection Sold | 1 - 3 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 564 [4],[5] 2,356 [4],[5]
Other Contracts | Protection Sold | 3 - 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount 815 [4],[5] 717 [4],[5]
Other Contracts | Protection Sold | Over 5 Years
    
Credit Derivatives [Line Items]    
Credit risk derivatives, notional amount $ 2,301 [4],[5] $ 2,469 [4],[5]
[1] Fair value amounts are shown on a gross basis prior to cash collateral or counterparty netting.
[2] Fair value amounts of certain credit default swaps where the Company sold protection have an asset carrying value because credit spreads of the underlying reference entity or entities tightened during the terms of the contracts.
[3] Credit ratings are calculated internally.
[4] Other credit contracts include CLNs, CDOs and credit default swaps that are considered hybrid instruments.
[5] Fair value amount shown represents the fair value of the hybrid instruments.