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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 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total
Balance at beginning of period	$ 2,034	$ 1,724
Deferrals	170	154
Amortization	(144)	(148)
Interest	13	10
Unlocking	(5)	1
Adjustment for net unrealized investment (gains) losses	427	127
Balance at end of period	2,495	1,868
VOBA
Total
Balance at beginning of period	1,185	1,466
Deferrals	0	0
Amortization	(94)	(132)
Interest	7	8
Unlocking	(6)	1
Adjustment for net unrealized investment (gains) losses	318	132
Balance at end of period	1,410	1,475
DAC
Total
Balance at beginning of period	761	222
Deferrals	154	133
Amortization	(39)	(8)
Interest	6	2
Unlocking	(1)	0
Adjustment for net unrealized investment (gains) losses	88	(5)
Balance at end of period	969	344
DSI
Total
Balance at beginning of period	88	36
Deferrals		21
Amortization	(11)	(8)
Interest	0	0
Unlocking	2	0
Adjustment for net unrealized investment (gains) losses	21	0
Balance at end of period	$ 116	$ 49

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Amount of addition in deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination.

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