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INVESTMENTS - Net Unrealized Gain (Losses) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Beginning of year | $ 5,471 | $ 9,456 | $ 3,141 | $ 11,927
End of year | 5,260 | 7,111 | 5,260 | 7,111
Unrealized Investment Gains Losses All Other | Net Unrealized Gains (Losses) on Investments | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Beginning of year | (7,978) | (1,287) | (9,606) | 4,809
Net investment gains (losses) arising during the period | (710) | (5,889) | 845 | (12,314)
Included in net income (loss) | 46 | 214 | 126 | 548
Excluded from net income (loss) | 0 | 0 |  |
Other | 0 | 0 | 0 | 0
Impact of net unrealized investment gains (losses) | 0 | 0 | 0 | 0
Net unrealized investment gains (losses) excluding credit losses |  | (6,962) |  |
End of year | (8,641) | (6,965) | (8,641) | (6,965)
Unrealized Investment Gains Losses All Other | Policyholders’ Liabilities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Beginning of year | 33 | 4 | 41 | (169)
Impact of net unrealized investment gains (losses) | 3 | 21 | (5) | 194
End of year | 36 | 25 | 36 | 25
Unrealized Investment Gains Losses All Other | Policyholders’ Liabilities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Fixed maturities, AFS |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) excluding credit losses |  | 25 |  |
Unrealized Investment Gains Losses All Other | Deferred Income Tax Asset (Liability) | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Beginning of year | 99 | 269 | 440 | (974)
Other | 0 | 0 | 0 |
Impact of net unrealized investment gains (losses) | 139 | 1,187 | (203) | 2,429
End of year | 238 | 1,457 | 238 | 1,457
Unrealized Investment Gains Losses All Other | Deferred Income Tax Asset (Liability) | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Fixed maturities, AFS |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) excluding credit losses |  | 1,456 |  |
Unrealized Investment Gains Losses All Other | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Beginning of year | (7,846) | (1,014) | (9,125) | 3,666
Net investment gains (losses) arising during the period | (710) | (5,889) | 845 | (12,314)
Included in net income (loss) | 46 | 214 | 126 | 548
Excluded from net income (loss) | 0 | 0 |  |
Other | 0 | 0 | 0 | 0
Impact of net unrealized investment gains (losses) | 142 | 1,208 | (208) | 2,623
Net unrealized investment gains (losses) excluding credit losses |  | (5,481) |  |
End of year | (8,367) | (5,483) | (8,367) | (5,483)
Net Unrealized Gains (Losses) On Investments Excluding Credit Losses | Net Unrealized Gains (Losses) on Investments | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) excluding credit losses | (8,642) |  | (8,635) | (6,957)
Net Unrealized Gains (Losses) On Investments Excluding Credit Losses | Policyholders’ Liabilities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Fixed maturities, AFS |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) excluding credit losses | 36 |  | 36 | 25
Net Unrealized Gains (Losses) On Investments Excluding Credit Losses | Deferred Income Tax Asset (Liability) | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Fixed maturities, AFS |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) excluding credit losses | 238 |  | 237 | 1,455
Net Unrealized Gains (Losses) On Investments Excluding Credit Losses | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) excluding credit losses | (8,368) |  | (8,362) | (5,477)
Net Unrealized Gains (Losses) On Investments Including Credit Losses | Net Unrealized Gains (Losses) on Investments | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) with credit losses | 1 | (3) | (6) | (8)
Net Unrealized Gains (Losses) On Investments Including Credit Losses | Policyholders’ Liabilities | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Fixed maturities, AFS |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) with credit losses | 0 | 0 | 0 | 0
Net Unrealized Gains (Losses) On Investments Including Credit Losses | Deferred Income Tax Asset (Liability) | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Fixed maturities, AFS |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) with credit losses | 0 | 1 | 1 | 2
Net Unrealized Gains (Losses) On Investments Including Credit Losses | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) |  |  |  |
Debt Securities, Available-for-sale, Net Unrealized Investments [Roll Forward] |  |  |  |
Net unrealized investment gains (losses) with credit losses | $ 1 | $ (2) | $ (5) | $ (6)

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