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INVESTMENTS - Net Unrealized Gain (Losses) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Balance, beginning of period | $ 4,388 | $ 3,141 | $ 11,927
Net unrealized investment gains (losses) | (827) | 2,399 | (12,952)
Balance, end of period | 3,443 | 4,388 | 3,141
Valuation allowance | 217 | 234 | 1,600
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains (Losses), All Other | Net Unrealized Gains (Losses) on Investments |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Balance, beginning of period | (6,999) | (9,606) | 4,809
Net investment gains (losses) arising during the period | (1,127) | 2,048 | (15,275)
Included in net income (loss) | 58 | 563 | 867
Other | 0 | 0 | 0
Impact of net unrealized investment gains (losses) | 0 | 0 | 0
Balance, end of period | (8,074) | (6,999) | (9,606)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains (Losses), All Other | Policyholders’ Liabilities |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Balance, beginning of period | 50 | 41 | (169)
Net investment gains (losses) arising during the period | 0 | 0 | 0
Included in net income (loss) | 0 | 0 | 0
Other | 0 | 0 | 0
Impact of net unrealized investment gains (losses) | 21 | 9 | 210
Balance, end of period | 71 | 50 | 41
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains (Losses), All Other | Deferred Income Tax Asset (Liability) |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Balance, beginning of period | 226 | 440 | (974)
Net investment gains (losses) arising during the period | 0 | 0 | 0
Included in net income (loss) | 0 | 0 | 0
Other | 17 | 336 | (1,569)
Impact of net unrealized investment gains (losses) | 220 | (551) | 2,982
Balance, end of period | 464 | 226 | 440
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Unrealized Investment Gains (Losses), All Other | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Balance, beginning of period | (6,723) | (9,125) | 3,666
Net investment gains (losses) arising during the period | (1,127) | 2,048 | (15,275)
Included in net income (loss) | 58 | 563 | 867
Other | 17 | 336 | (1,569)
Impact of net unrealized investment gains (losses) | 241 | (542) | 3,192
Balance, end of period | (7,539) | (6,723) | (9,125)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) excluding credit losses | Net Unrealized Gains (Losses) on Investments |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Net unrealized investment gains (losses) | (8,068) | (6,995) | (9,599)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) excluding credit losses | Policyholders’ Liabilities |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Net unrealized investment gains (losses) | 71 | 50 | 41
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) excluding credit losses | Deferred Income Tax Asset (Liability) |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Net unrealized investment gains (losses) | 463 | 225 | 439
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) excluding 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) | (7,534) | (6,720) | (9,119)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) with credit losses | Net Unrealized Gains (Losses) on Investments |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Net unrealized investment gains (losses) | (6) | (4) | (7)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) with credit losses | Policyholders’ Liabilities |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Net unrealized investment gains (losses) | 0 | 0 | 0
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) with credit losses | Deferred Income Tax Asset (Liability) |  |  |
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward] |  |  |
Net unrealized investment gains (losses) | 1 | 1 | 1
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent | Net unrealized investment gains (losses) with 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) | $ (5) | $ (3) | $ (6)

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