v3.26.1
INVESTMENTS - Net Unrealized Gain (Losses) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Debt Securities, Available-For-Sale, Net Unrealized Investments [Roll Forward]    
Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance $ 1,466 $ 3,423
Net unrealized gains (losses) on investments (697) 664
Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance 1,860 4,205
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]    
Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance (4,944) (8,074)
Net investment gains (losses) arising during the period (898) 844
Included in net income (loss) 20 8
Excluded from net income (loss) 0  
Other 0 0
Impact of net unrealized investment gains (losses) 0 0
Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance (5,828) (7,226)
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]    
Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance 24 71
Net investment gains (losses) arising during the period 0 0
Included in net income (loss) 0 0
Excluded from net income (loss) 0  
Other 0 0
Impact of net unrealized investment gains (losses) (5) (5)
Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance 19 66
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]    
Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance 10 464
Net investment gains (losses) arising during the period 0 0
Included in net income (loss) 0 0
Excluded from net income (loss) 0  
Other (4) (8)
Impact of net unrealized investment gains (losses) 186 (178)
Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance 193 279
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]    
Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance (4,910) (7,539)
Net investment gains (losses) arising during the period (898) 844
Included in net income (loss) 20 8
Excluded from net income (loss) 0  
Other (4) (8)
Impact of net unrealized investment gains (losses) 181 (183)
Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance (5,616) (6,881)
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 gains (losses) on investments (5,822) (7,222)
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 gains (losses) on investments 19 66
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 gains (losses) on investments 192 278
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 gains (losses) on investments (5,611) (6,878)
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 gains (losses) on investments (6) (4)
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 gains (losses) on investments 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 gains (losses) on investments 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 gains (losses) on investments $ (5) $ (3)