v2.4.0.6
Guarantees, Pledged Assets and Collateral (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Guarantees [Abstract]    
Carrying value $ 1,701 $ 1,084
Maximum exposure to loss 56,697 69,849
Guarantee Obligations, Noninvestment Grade 28,740 29,885
Pledged Assets and Collateral    
Pledged assets without the right to sell or repledge 398,282 406,814
Available for sale Securities [Member]
   
Pledged Assets and Collateral    
Pledged assets without the right to sell or repledge 80,540 94,212
Loans and Finance Receivables [Member]
   
Pledged Assets and Collateral    
Pledged assets without the right to sell or repledge 317,742 312,602
Standby Letters of Credit [Member]
   
Guarantees [Abstract]    
Carrying value 85 142
Maximum exposure to loss 41,171 42,159
Guarantee Obligations, Noninvestment Grade 22,259 19,596
Residual value guarantees [Member]
   
Guarantees [Abstract]    
Carrying value 8 8
Maximum exposure to loss 197 197
Guarantee Obligations, Noninvestment Grade 0 0
Liquidity agreements [Member]
   
Guarantees [Abstract]    
Carrying value 0 0
Maximum exposure to loss 2 49
Guarantee Obligations, Noninvestment Grade 2 1
Securities lending and other indemnifications [Member]
   
Guarantees [Abstract]    
Carrying value 0 45
Maximum exposure to loss 669 13,645
Guarantee Obligations, Noninvestment Grade 62 3,993
Written put options [Member]
   
Guarantees [Abstract]    
Carrying value 1,469 747
Maximum exposure to loss 8,224 8,134
Guarantee Obligations, Noninvestment Grade 2,466 2,615
Loans and MHFS sold with recourse [Member]
   
Guarantees [Abstract]    
Carrying value 102 119
Maximum exposure to loss 5,784 5,474
Guarantee Obligations, Noninvestment Grade 3,850 3,564
Contingent consideration [Member]
   
Guarantees [Abstract]    
Carrying value 31 23
Maximum exposure to loss 98 118
Guarantee Obligations, Noninvestment Grade 97 116
Other guarantees [Member]
   
Guarantees [Abstract]    
Carrying value 6 0
Maximum exposure to loss 552 73
Guarantee Obligations, Noninvestment Grade $ 4 $ 0