Derivatives - Credit Derivatives (Details) (USD $)
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Dec. 31, 2012
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Dec. 31, 2011
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value, Gross Liability |
$ 1,364,800,000,000
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$ 1,861,300,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
389,140,000,000
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316,066,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
459,211,000,000
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632,264,000,000
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
617,917,000,000
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678,480,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
134,047,000,000
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276,972,000,000
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Notional Amount of Derivatives |
1,600,315,000,000
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1,903,782,000,000
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In Text Details [Abstract] |
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Carrying value of written credit derivatives |
20,700,000,000
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48,000,000,000
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Notional Amount of Written Credit Derivatives With Identical Referenced Underlying Held by Entity |
1,100,000,000,000
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1,000,000,000,000
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Credit Derivative [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
1,071,000,000
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5,553,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
5,264,000,000
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16,451,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
12,664,000,000
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35,406,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
13,899,000,000
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33,793,000,000
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Derivative Liability, Fair Value, Gross Liability |
32,898,000,000
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91,203,000,000
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Credit Default Swap [Member] | Credit Risk Contract [Member] | Credit Default Swap, Selling Protection [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
975,000,000
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5,031,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
5,160,000,000
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16,449,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
12,625,000,000
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35,343,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
13,862,000,000
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33,664,000,000
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Derivative Liability, Fair Value, Gross Liability |
32,622,000,000
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90,487,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
340,038,000,000
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315,761,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
448,168,000,000
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630,241,000,000
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
610,286,000,000
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664,446,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
133,012,000,000
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275,496,000,000
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Notional Amount of Derivatives |
1,531,504,000,000
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[1] |
1,885,944,000,000
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[1] |
Credit Default Swap [Member] | Credit Risk Contract [Member] | Credit Default Swap, Selling Protection [Member] | External Credit Rating, Investment Grade [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
52,000,000
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795,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
757,000,000
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5,011,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
5,595,000,000
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17,271,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
2,903,000,000
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7,325,000,000
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Derivative Liability, Fair Value, Gross Liability |
9,307,000,000
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30,402,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
260,177,000,000
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182,137,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
349,125,000,000
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401,914,000,000
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
500,038,000,000
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477,924,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
90,453,000,000
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127,570,000,000
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Notional Amount of Derivatives |
1,199,793,000,000
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1,189,545,000,000
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Credit Default Swap [Member] | Credit Risk Contract [Member] | Credit Default Swap, Selling Protection [Member] | External Credit Rating, Non Investment Grade [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
923,000,000
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4,236,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
4,403,000,000
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11,438,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
7,030,000,000
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18,072,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
10,959,000,000
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26,339,000,000
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Derivative Liability, Fair Value, Gross Liability |
23,315,000,000
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60,085,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
79,861,000,000
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133,624,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
99,043,000,000
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228,327,000,000
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
110,248,000,000
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186,522,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
42,559,000,000
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147,926,000,000
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Notional Amount of Derivatives |
331,711,000,000
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696,399,000,000
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Return Swaps Other [Member] | Credit Risk Contract [Member] | Credit Default Swap, Selling Protection [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
96,000,000
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522,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
104,000,000
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2,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
39,000,000
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63,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
37,000,000
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129,000,000
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Derivative Liability, Fair Value, Gross Liability |
276,000,000
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716,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
49,102,000,000
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305,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
11,043,000,000
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2,023,000,000
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
7,631,000,000
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14,034,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
1,035,000,000
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1,476,000,000
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Notional Amount of Derivatives |
68,811,000,000
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[1] |
17,838,000,000
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[1] |
Return Swaps Other [Member] | Credit Risk Contract [Member] | Credit Default Swap, Selling Protection [Member] | External Credit Rating, Investment Grade [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
39,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
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30,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
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1,000,000
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Derivative Liability, Fair Value, Gross Liability |
39,000,000
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31,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
43,536,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
15,000,000
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0
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
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9,116,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
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0
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Notional Amount of Derivatives |
43,551,000,000
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9,116,000,000
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Return Swaps Other [Member] | Credit Risk Contract [Member] | Credit Default Swap, Selling Protection [Member] | External Credit Rating, Non Investment Grade [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
57,000,000
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522,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
104,000,000
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2,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
39,000,000
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33,000,000
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Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
37,000,000
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128,000,000
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Derivative Liability, Fair Value, Gross Liability |
237,000,000
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685,000,000
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Notional Amount of Derivatives [Abstract] |
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Derivative Liability, Notional Amount, Expiration Less Than One Year |
5,566,000,000
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305,000,000
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Derivative Liability, Notional Amount, Expiration From One to Three Years |
11,028,000,000
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2,023,000,000
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Derivative Liability, Notional Amount, Expiration From Three to Five Years |
7,631,000,000
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4,918,000,000
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Derivative Liability, Notional Amount, Greater Than Five Years |
1,035,000,000
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1,476,000,000
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Notional Amount of Derivatives |
25,260,000,000
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8,722,000,000
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Credit-related notes [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
120,000,000,000
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[2] |
127,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
173,000,000,000
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[2] |
92,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
755,000,000,000
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[2] |
340,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
5,274,000,000,000
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[2] |
4,679,000,000
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[2] |
Derivative Liability, Fair Value, Gross Liability |
6,322,000,000,000
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[2] |
5,238,000,000
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[2] |
Credit-related notes [Member] | External Credit Rating, Investment Grade [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
3,628,000,000
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[2] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
12,494,000,000
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[2] |
7,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
440,832,000,000
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[2] |
208,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
3,848,992,000,000
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[2] |
2,947,000,000
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[2] |
Derivative Liability, Fair Value, Gross Liability |
4,306,000,000,000
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[2] |
3,162,000,000
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[2] |
Credit-related notes [Member] | External Credit Rating, Non Investment Grade [Member]
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Carrying Value [Abstract] |
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Derivative Liability, Fair Value of Derivative Liability, Expiration Less Than One Year |
116,015,000,000
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[2] |
127,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration From One to Three Years |
161,031,000,000
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[2] |
85,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration From Three To Five Years |
314,010,000,000
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[2] |
132,000,000
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[2] |
Derivative Liability, Fair Value of Derivative Liability, Expiration Greater Than Five Years |
1,425,325,000,000
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[2] |
1,732,000,000
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[2] |
Derivative Liability, Fair Value, Gross Liability |
$ 2,016,000,000,000
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[2] |
$ 2,076,000,000
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[2] |
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