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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 | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Total |  |
Balance at beginning of period | $ 1,724 | $ 0
F&G acquisition |  | 1,890
Deferrals | 322 | 34
Amortization | (232) | (3)
Interest | 20 | 3
Unlocking | 17 |
Adjustment for net unrealized investment (gains) losses | (47) | (111)
Balance at end of period | 1,804 | 1,813
VOBA |  |
Total |  |
Balance at beginning of period | 1,466 | 0
F&G acquisition |  | 1,890
Deferrals | 0 | 0
Amortization | (204) | (3)
Interest | 15 | 3
Unlocking | 16 |
Adjustment for net unrealized investment (gains) losses | (15) | (101)
Balance at end of period | 1,339 | 1,789
DAC |  |
Total |  |
Balance at beginning of period | 222 | 0
F&G acquisition |  | 0
Deferrals | 278 | 28
Amortization | (16) | 0
Interest | 5 | 0
Unlocking | 0 |
Adjustment for net unrealized investment (gains) losses | (27) | (8)
Balance at end of period | 462 | 20
DSI |  |
Total |  |
Balance at beginning of period | 36 | 0
F&G acquisition |  | 0
Deferrals | 44 | 6
Amortization | (12) | 0
Interest | 0 | 0
Unlocking | 1 |
Adjustment for net unrealized investment (gains) losses | (5) | (2)
Balance at end of period | $ 64 | $ 4

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