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Investments (Changes In Allowance For Credit Losses On Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Balance | $ 81 | $ 170 | $ 96 | $ 204
Additions (reductions) from provision for credit loss expense | 10 | (39) | (5) | (73)
Balance | 91 | 131 | 91 | 131
Accrued interest receivable excluded from credit losses |  | 50 |  | 50
Unfunded Loan Commitment [Member] |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | 1 |  | (1) | 4
Commercial [Member] |  |  |  |
Balance | 72 | 156 | 79 | 187
Additions (reductions) from provision for credit loss expense | 8 | (41) | 1 | (72)
Balance | 80 | 115 | 80 | 115
Residential [Member] |  |  |  |
Balance | 9 | 14 | 17 | 17
Additions (reductions) from provision for credit loss expense | 2 | 2 | (6) | (1)
Balance | $ 11 | $ 16 | $ 11 | $ 16

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