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Investments - OTTI losses by asset type (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Realized capital gains and losses by asset type |  |  |  |
Fixed income securities | $ (37) | $ (13) | $ (49) | $ (24)
Total credit losses by asset type | (37) | (13) | (49) | (24)
Commitments to fund commercial mortgage loans and bank loans | 0 | 0 | 0 | 0
Fixed income securities |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Fixed income securities | (7) | (4) | (16) | (4)
Corporate |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Fixed income securities | (7) | (4) | (16) | (4)
Mortgage loans |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Total credit losses by asset type | (3) | 0 | (3) | (1)
Limited partnership interests |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Total credit losses by asset type | (16) | (3) | (16) | (3)
Bank loans |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Total credit losses by asset type | $ (11) | $ (6) | $ (14) | $ (16)

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