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FAIR VALUE DISCLOSURES (FAIR VALUE MEASUREMENTS) (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale $ 33,435 $ 32,683
Trading securities 12,053 9,134
Fair Value, Measurements, Recurring    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 33,300 32,570
Other equity investments 5 8
Trading securities 12,053 9,134
Other invested assets 2,994 1,178
Cash equivalents 3,271 1,529
Segregated securities 789 946
GMIB reinsurance contract asset 10,933 10,309
Separate Accounts’ assets 119,065 111,216
Total Assets 182,410 166,890
Liabilities, Fair Value Disclosure [Abstract]    
Contingent payment arrangements 12 18
Total Liabilities 6,411 6,432
Fair Value, Measurements, Recurring | Corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 13,139 13,012
Fair Value, Measurements, Recurring | Private corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 7,290 7,040
Fair Value, Measurements, Recurring | U.S. Treasury, government and agency    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 10,936 10,336
Fair Value, Measurements, Recurring | State and Political Sub- divisions    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 481 493
Fair Value, Measurements, Recurring | Foreign Govts    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 393 390
Fair Value, Measurements, Recurring | Commercial Mortgage- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 262 371
Fair Value, Measurements, Recurring | Residential Mortgage- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 265 314
Fair Value, Measurements, Recurring | Asset- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 30 60
Fair Value, Measurements, Recurring | Redeemable Preferred Stock    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 504 554
Fair Value, Measurements, Recurring | Short-term investments    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 770 574
Fair Value, Measurements, Recurring | Assets of Consolidated VIEs/VOEs [Member]    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 802 553
Fair Value, Measurements, Recurring | Swaps    
Investment Fair Value Disclosure [Abstract]    
Other invested assets (125) (925)
Fair Value, Measurements, Recurring | Credit Default Swaps    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 30 5
Fair Value, Measurements, Recurring | Options    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 1,517 960
Fair Value, Measurements, Recurring | Floors    
Investment Fair Value Disclosure [Abstract]    
Other invested assets   11
Fair Value, Measurements, Recurring | GMxB derivative features’ liability    
Liabilities, Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 4,375 5,289
Fair Value, Measurements, Recurring | SCS, SIO, MSO and IUL indexed features’ liability    
Liabilities, Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 1,437 875
Fair Value, Measurements, Recurring | Level 1    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 180 218
Other equity investments 4 3
Trading securities 481 478
Other invested assets 670 342
Cash equivalents 3,271 1,529
Segregated securities 0  
Separate Accounts’ assets 115,810 108,085
Total Assets 120,416 110,655
Liabilities, Fair Value Disclosure [Abstract]    
Total Liabilities 584 248
Fair Value, Measurements, Recurring | Level 1 | Corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 0  
Fair Value, Measurements, Recurring | Level 1 | Redeemable Preferred Stock    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 180 218
Fair Value, Measurements, Recurring | Level 1 | Assets of Consolidated VIEs/VOEs [Member]    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 670 342
Fair Value, Measurements, Recurring | Level 2    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 31,676 31,091
Other equity investments 0 0
Trading securities 11,572 8,656
Other invested assets 2,322 830
Cash equivalents 0  
Segregated securities 789 946
Separate Accounts’ assets 2,918 2,818
Total Assets 49,277 44,341
Liabilities, Fair Value Disclosure [Abstract]    
Total Liabilities 1,440 877
Fair Value, Measurements, Recurring | Level 2 | Corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 13,052 12,984
Fair Value, Measurements, Recurring | Level 2 | Private corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 6,231 6,223
Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury, government and agency    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 10,936 10,336
Fair Value, Measurements, Recurring | Level 2 | State and Political Sub- divisions    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 440 451
Fair Value, Measurements, Recurring | Level 2 | Foreign Govts    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 393 390
Fair Value, Measurements, Recurring | Level 2 | Commercial Mortgage- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 14 22
Fair Value, Measurements, Recurring | Level 2 | Residential Mortgage- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 265 314
Fair Value, Measurements, Recurring | Level 2 | Asset- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 22 36
Fair Value, Measurements, Recurring | Level 2 | Redeemable Preferred Stock    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 323 335
Fair Value, Measurements, Recurring | Level 2 | Short-term investments    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 770 574
Fair Value, Measurements, Recurring | Level 2 | Assets of Consolidated VIEs/VOEs [Member]    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 130 205
Fair Value, Measurements, Recurring | Level 2 | Swaps    
Investment Fair Value Disclosure [Abstract]    
Other invested assets (125) (925)
Fair Value, Measurements, Recurring | Level 2 | Credit Default Swaps    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 30 5
Fair Value, Measurements, Recurring | Level 2 | Options    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 1,517 960
Fair Value, Measurements, Recurring | Level 2 | Floors    
Investment Fair Value Disclosure [Abstract]    
Other invested assets   11
Fair Value, Measurements, Recurring | Level 2 | GMxB derivative features’ liability    
Liabilities, Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 0  
Fair Value, Measurements, Recurring | Level 2 | SCS, SIO, MSO and IUL indexed features’ liability    
Liabilities, Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 1,437 875
Fair Value, Measurements, Recurring | Level 3    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 1,444 1,261
Other equity investments 1 5
Trading securities 0  
Other invested assets 2 6
GMIB reinsurance contract asset 10,933 10,309
Separate Accounts’ assets 337 313
Total Assets 12,717 11,894
Liabilities, Fair Value Disclosure [Abstract]    
Contingent payment arrangements 12 18
Total Liabilities 4,387 5,307
Fair Value, Measurements, Recurring | Level 3 | Corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 87 28
Fair Value, Measurements, Recurring | Level 3 | Private corporate    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 1,059 817
Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury, government and agency    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 0  
Fair Value, Measurements, Recurring | Level 3 | State and Political Sub- divisions    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 41 42
Fair Value, Measurements, Recurring | Level 3 | Foreign Govts    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 0 0
Fair Value, Measurements, Recurring | Level 3 | Commercial Mortgage- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 248 349
Fair Value, Measurements, Recurring | Level 3 | Residential Mortgage- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 0 0
Fair Value, Measurements, Recurring | Level 3 | Asset- backed    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 8 24
Fair Value, Measurements, Recurring | Level 3 | Redeemable Preferred Stock    
Investment Fair Value Disclosure [Abstract]    
Fixed maturities, available-for-sale 1 1
Fair Value, Measurements, Recurring | Level 3 | Assets of Consolidated VIEs/VOEs [Member]    
Investment Fair Value Disclosure [Abstract]    
Other invested assets 2 6
Fair Value, Measurements, Recurring | Level 3 | GMxB derivative features’ liability    
Liabilities, Fair Value Disclosure [Abstract]    
Guarantees, Fair Value Disclosure 4,375 5,289
Variable Interest Entity, Primary Beneficiary | Fair Value, Measurements, Recurring    
Liabilities, Fair Value Disclosure [Abstract]    
Derivative Liability 587 250
Variable Interest Entity, Primary Beneficiary | Fair Value, Measurements, Recurring | Level 1    
Liabilities, Fair Value Disclosure [Abstract]    
Derivative Liability 584 248
Variable Interest Entity, Primary Beneficiary | Fair Value, Measurements, Recurring | Level 2    
Liabilities, Fair Value Disclosure [Abstract]    
Derivative Liability $ 3 $ 2