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FAIR VALUE DISCLOSURES (DETAILS) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure $ 33,031 $ 32,011
Trading securities 1,527 982
Fair Value, Measurements, Recurring [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 33,011 31,992
Other equity investments 131 143
Trading securities 1,527 982
Other invested assets: 1,680 1,668
Cash equivalents 2,926 2,475
Segregated securities 1,155 1,280
GMIB reinsurance contracts 11,381 10,547
Separate Accounts assets 89,985 86,419
Total Assets 141,796 135,506
Liabilities Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 334 291
Total Liabilities 334 291
Fair Value, Measurements, Recurring [Member] | Corporate [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 22,719 23,137
Fair Value, Measurements, Recurring [Member] | U.S.Treasury, Govt and Agency [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 5,140 3,948
Fair Value, Measurements, Recurring [Member] | State and Political Sub-divisions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 526 540
Fair Value, Measurements, Recurring [Member] | Foreign Govts [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 522 525
Fair Value, Measurements, Recurring [Member] | Commercial Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 906 902
Fair Value, Measurements, Recurring [Member] | Residential Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 1,800 1,646
Fair Value, Measurements, Recurring [Member] | Asset-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 226 264
Fair Value, Measurements, Recurring [Member] | Redeemable preferred stock [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 1,172 1,030
Fair Value, Measurements, Recurring [Member] | Short Term Investments [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 134 132
Fair Value, Measurements, Recurring [Member] | Swap [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 199 175
Fair Value, Measurements, Recurring [Member] | Future [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: (4) (2)
Fair Value, Measurements, Recurring [Member] | Options Held [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 99 7
Fair Value, Measurements, Recurring [Member] | Interest Rate Floor [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 315 327
Fair Value, Measurements, Recurring [Member] | Swaptions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 937 1,029
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 297 210
Other equity investments 65 66
Trading securities 471 457
Other invested assets: (4) (2)
Cash equivalents 2,926 2,475
Segregated securities 0 0
GMIB reinsurance contracts 0 0
Separate Accounts assets 87,175 83,672
Total Assets 90,930 86,878
Liabilities Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 0 0
Total Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Corporate [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 7 7
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | U.S.Treasury, Govt and Agency [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | State and Political Sub-divisions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Foreign Govts [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Commercial Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Residential Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Asset-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Redeemable preferred stock [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 290 203
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Short Term Investments [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Swap [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Future [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: (4) (2)
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Options Held [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Interest Rate Floor [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 1 [Member] | Swaptions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 31,208 30,173
Other equity investments 8 0
Trading securities 1,056 525
Other invested assets: 1,684 1,672
Cash equivalents 0 0
Segregated securities 1,155 1,280
GMIB reinsurance contracts 0 0
Separate Accounts assets 2,588 2,532
Total Assets 37,699 36,182
Liabilities Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 0 0
Total Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Corporate [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 22,329 22,698
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | U.S.Treasury, Govt and Agency [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 5,140 3,948
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | State and Political Sub-divisions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 474 487
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Foreign Govts [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 522 503
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Commercial Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Residential Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 1,789 1,632
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Asset-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 87 92
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Redeemable preferred stock [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 867 813
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Short Term Investments [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 134 132
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Swap [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 199 177
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Future [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Options Held [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 99 7
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Interest Rate Floor [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 315 327
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 2 [Member] | Swaptions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 937 1,029
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 1,506 1,609
Other equity investments 58 77
Trading securities 0 0
Other invested assets: 0 (2)
Cash equivalents 0 0
Segregated securities 0 0
GMIB reinsurance contracts 11,381 10,547
Separate Accounts assets 222 215
Total Assets 13,167 12,446
Liabilities Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 334 291
Total Liabilities 334 291
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Corporate [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 383 432
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | U.S.Treasury, Govt and Agency [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | State and Political Sub-divisions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 52 53
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Foreign Govts [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 0 22
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Commercial Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 906 902
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Residential Mortgage-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 11 14
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Asset-backed [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 139 172
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Redeemable preferred stock [Member]
   
Investment Fair Value Disclosure [Abstract]    
Available-for-sale Securities, Fair Value Disclosure 15 14
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Short Term Investments [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Swap [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 (2)
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Future [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Options Held [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Interest Rate Floor [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: 0 0
Fair Value, Measurements, Recurring [Member] | Fair Value Inputs Level 3 [Member] | Swaptions [Member]
   
Investment Fair Value Disclosure [Abstract]    
Other invested assets: $ 0 $ 0