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Investments - OTTI losses by asset type (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Realized capital gains and losses by asset type |  |
Fixed income securities | $ 2 | $ (37)
Total credit losses by asset type | 2 | (36)
Commitments to fund commercial mortgage loans, bank loans and agent loans | 0 | (1)
Fixed income securities |  |
Realized capital gains and losses by asset type |  |
Fixed income securities | 2 | (2)
Corporate |  |
Realized capital gains and losses by asset type |  |
Fixed income securities | 1 | (1)
ABS |  |
Realized capital gains and losses by asset type |  |
Fixed income securities | 1 | 0
MBS |  |
Realized capital gains and losses by asset type |  |
Fixed income securities | 0 | (1)
Mortgage loans |  |
Realized capital gains and losses by asset type |  |
Total credit losses by asset type | 6 | (9)
Limited partnership interests |  |
Realized capital gains and losses by asset type |  |
Total credit losses by asset type | 0 | (5)
Bank loans, net |  |
Realized capital gains and losses by asset type |  |
Total credit losses by asset type | $ (6) | $ (20)

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