Value of Business Acquired and Deferred Acquisition Costs (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2022	Dec. 31, 2020
Changes in the VOBA Balance
Balance, beginning of period	$ 565	$ 586	$ 479	$ 696
Amortization - VOBA	(17)	29	(45)	14
Amortization - unlock benefit (charge), pre-tax	(73)	14	(34)	(64)
Adjustments to unrealized gains on fixed maturities, AFS and other	4	26	108	(60)
Balance, end of period	479	$ 655	508	$ 586
Expected Remaining VOBA Amortization (Successor Company)
2023			13
2024			10
2025			16
2026			25
2027			25
Changes in the DAC Asset (Successor Company)
Balance, beginning of period			0
Additions			22
Amortization - DAC			0
Amortization - unlock benefit (charge), pre-tax			0
Reinsurance impact			(11)
Balance, end of period	$ 0		$ 11

Deferred Policy Acquisition Cost, Reinsurance Impact

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Amount of increase (decrease) to amortization expense of deferred policy acquisition cost (DAC) due to assumption change.

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Amount of other increase (decrease) to amortization expense of deferred policy acquisition cost (DAC).

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Amount of deferred policy acquisition cost capitalized on contract remaining in force.

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Amount of deferred policy acquisition cost capitalized.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of amortization expense (reversal of expense) for present value of future profits of insurance contract acquired in business combination.

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Amount of amortization expense (reversal of amortization expense) for future profits of insurance contract acquired in business combination from assumption change.

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized during fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for present value of future profits of insurance contract acquired in business combination expected to be recognized during next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of unrealized investment gain (loss) which decreases (increases) present value of future profits of insurance contract acquired in business combination.

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Amount, after accumulated amortization, of present value of future profits of insurance contract acquired in business combination.

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