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Investments (Changes In Allowance For Credit Losses On Mortgage Loans On Real Estate) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Balance | $ 77 | $ 184 | $ 96 | $ 204
Additions (reductions) from provision for credit loss expense | 4 | (14) | (15) | (34)
Balance | 81 | 170 | 81 | 170
Accrued interest receivable excluded from credit losses | 49 | 50 | 49 | 50
Unfunded Loan Commitment [Member] |  |  |  |
Financing Receivable, Credit Loss, Expense (Reversal) | (1) | (1) | (1) | 2
Commercial [Member] |  |  |  |
Balance | 59 | 172 | 79 | 187
Additions (reductions) from provision for credit loss expense | 13 | (16) | (7) | (31)
Balance | 72 | 156 | 72 | 156
Residential [Member] |  |  |  |
Balance | 18 | 12 | 17 | 17
Additions (reductions) from provision for credit loss expense | (9) | 2 | (8) | (3)
Balance | $ 9 | $ 14 | $ 9 | $ 14

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