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FAIR VALUE MEASUREMENTS - Fair Value Hierarchy Levels of Assets and Liabilities Carried at Cost or Amortized Cost (Details) - USD ($) $ in Millions | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | $ 38,772 | $ 33,459
Securities held to maturity, fixed maturities, fair value | 47,937 | 37,520
Other investments carried at amortized cost | 795 | 118
Other investments carried at amortized cost, fair value | 801 | 118
Total financial instruments assets not carried at fair value | 39,567 | 33,577
Assets fair value disclosure financial instruments carried at cost | 48,738 | 37,638
Liabilities |  |
Other policyholder funds | 7,646 | 6,285
Other policyholders' funds fair value disclosure | 7,377 | 6,160
Notes payable | 5,743 | 4,991
Notes payable fair value disclosure | 5,994 | 5,285
Total financial instrument liabilities not carried at fair value | 13,389 | 11,276
Liabilities fair value disclosure financial instruments carried at cost | 13,371 | 11,445
Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 47,937 | 37,520
Government and agencies | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 23,852 | 20,004
Securities held to maturity, fixed maturities, fair value | 31,093 | 23,391
Municipalities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 404 | 341
Securities held to maturity, fixed maturities, fair value | 549 | 415
Mortgage- and asset-backed securities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 37 | 36
Securities held to maturity, fixed maturities, fair value | 39 | 38
Public utilities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 3,687 | 3,092
Securities held to maturity, fixed maturities, fair value | 4,198 | 3,203
Sovereign and supranational | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 2,998 | 2,555
Securities held to maturity, fixed maturities, fair value | 3,394 | 2,711
Banks/financial institutions | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 4,544 | 4,431
Securities held to maturity, fixed maturities, fair value | 4,790 | 4,546
Other corporate | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, amortized cost | 3,250 | 3,000
Securities held to maturity, fixed maturities, fair value | 3,874 | 3,216
Level 1 |  |
Assets: |  |
Other investments carried at amortized cost, fair value | 0 | 0
Assets fair value disclosure financial instruments carried at cost | 31,093 | 23,391
Liabilities |  |
Other policyholders' funds fair value disclosure | 0 | 0
Notes payable fair value disclosure | 0 | 0
Liabilities fair value disclosure financial instruments carried at cost | 0 | 0
Level 1 | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 31,093 | 23,391
Level 1 | Government and agencies | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 31,093 | 23,391
Level 1 | Municipalities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 1 | Mortgage- and asset-backed securities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 1 | Public utilities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 1 | Sovereign and supranational | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 1 | Banks/financial institutions | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 1 | Other corporate | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 2 |  |
Assets: |  |
Other investments carried at amortized cost, fair value | 0 | 0
Assets fair value disclosure financial instruments carried at cost | 16,817 | 14,103
Liabilities |  |
Other policyholders' funds fair value disclosure | 0 | 0
Notes payable fair value disclosure | 0 | 0
Liabilities fair value disclosure financial instruments carried at cost | 0 | 0
Level 2 | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 16,817 | 14,103
Level 2 | Government and agencies | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 2 | Municipalities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 549 | 415
Level 2 | Mortgage- and asset-backed securities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 12 | 12
Level 2 | Public utilities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 4,198 | 3,203
Level 2 | Sovereign and supranational | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 3,394 | 2,711
Level 2 | Banks/financial institutions | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 4,790 | 4,546
Level 2 | Other corporate | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 3,874 | 3,216
Level 3 |  |
Assets: |  |
Other investments carried at amortized cost, fair value | 801 | 118
Assets fair value disclosure financial instruments carried at cost | 828 | 144
Liabilities |  |
Other policyholders' funds fair value disclosure | 7,377 | 6,160
Notes payable fair value disclosure | 5,994 | 5,285
Liabilities fair value disclosure financial instruments carried at cost | 13,371 | 11,445
Level 3 | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 27 | 26
Level 3 | Government and agencies | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 3 | Municipalities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 3 | Mortgage- and asset-backed securities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 27 | 26
Level 3 | Public utilities | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 3 | Sovereign and supranational | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 3 | Banks/financial institutions | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | 0 | 0
Level 3 | Other corporate | Fixed maturities |  |
Assets: |  |
Securities held to maturity, fixed maturities, fair value | $ 0 | $ 0

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