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Investments - Schedule of Rollforward of Credit Loss Allowance for Bank Loans (Details) - Bank loans, net - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]        
Beginning balance $ (13) $ (52) $ (22) $ (57)
Net (increases) decreases related to credit losses 2 (11) 5 (14)
Reduction of allowance related to sales 0 1 0 6
Write-offs 0 0 6 3
Ending balance $ (11) $ (62) $ (11) $ (62)