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Schedule of Pre-Tax Gain (Loss) Recognized in Net Income (Loss) for Effects of Derivatives not Designated as Hedges (Detail) - Derivatives not designated as hedges - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Derivative [Line Items] |  |  |  |
Pre-tax gain (loss) recognized in net income | $ (24) | $ (69) | $ (91) | $ (67)
Equity index options | Net investment gains (losses) |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain (loss) recognized in net income | 1 | 5 | 6 | 6
Financial futures | Changes in fair value of market risk benefits and associated hedges |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain (loss) recognized in net income | (15) | (65) | (79) | (67)
Fixed indexed annuity embedded derivatives | Net investment gains (losses) |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain (loss) recognized in net income | (5) | (8) | (13) | (10)
Indexed universal life embedded derivatives | Net investment gains (losses) |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain (loss) recognized in net income | 2 | 2 | 6 | 7
Forward bond purchase commitments | Net investment gains (losses) |  |  |  |
Derivative [Line Items] |  |  |  |
Pre-tax gain (loss) recognized in net income | $ (7) | $ (3) | $ (11) | $ (3)

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