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v3.21.2

Contingencies - Additional Information (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Other Commitments [Line Items] |  |
Guarantees | $ 8.6 | $ 9.9
Maximum [Member] |  |
Other Commitments [Line Items] |  |
Fixed maturity guarantee remaining term | 4 years |

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