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Value of Business Acquired, Deferred Acquisition Costs and Deferred Sales Inducements - Summary of Changes in Carrying Amounts of Intangible Assets Including DAC, VOBA and DSI (Detail) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Total |  |
Balance at beginning of period | $ 1,724 | $ 0
F&G acquisition |  | 1,903
Deferrals | 492 | 155
Amortization | (436) | (61)
Interest | 32 | 13
Unlocking | (1) | (1)
Adjustment for net unrealized investment losses (gains) | 19 | (247)
Purchase price allocation adjustments | 61 |
Balance at end of period | 1,891 | 1,762
VOBA |  |
Total |  |
Balance at beginning of period | 1,466 | 0
F&G acquisition |  | 1,903
Deferrals | 0 | 0
Amortization | (376) | (56)
Interest | 23 | 12
Unlocking | (1) | (1)
Adjustment for net unrealized investment losses (gains) | 38 | (228)
Purchase price allocation adjustments | 61 |
Balance at end of period | 1,211 | 1,630
DAC |  |
Total |  |
Balance at beginning of period | 222 | 0
F&G acquisition |  | 0
Deferrals | 427 | 130
Amortization | (34) | (3)
Interest | 8 | 1
Unlocking | 1 | 0
Adjustment for net unrealized investment losses (gains) | (18) | (15)
Purchase price allocation adjustments | 0 |
Balance at end of period | 606 | 113
DSI |  |
Total |  |
Balance at beginning of period | 36 | 0
F&G acquisition |  | 0
Deferrals | 65 | 25
Amortization | (26) | (2)
Interest | 1 | 0
Unlocking | (1) | 0
Adjustment for net unrealized investment losses (gains) | (1) | (4)
Purchase price allocation adjustments | 0 |
Balance at end of period | $ 74 | $ 19

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