EQUITY - PREDECESSOR COMPANY - Other Net Unrealized Investment Gain Loss AOCI (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Unrealized Gains (Losses) on Available-for-Sale Fixed Maturity Securities on which an OTTI Loss has been Recognized
AOCI
Beginning balance	$ 0	$ 0	$ 14
Net investment gains (losses) on investments arising during the period	0	0	0
Reclassification adjustment for (gains) losses included in net income	0	0	0
Impact of net unrealized investment (gains) losses	0	0	0
Ending balance	0	0	0
Net Unrealized Gains (Losses) on Available-for-Sale Fixed Maturity Securities on which an OTTI Loss has been Recognized \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			(14)
Net unrealized gains (losses) on investments on available-for-sale fixed maturity securities on which an allowance for credit losses has been recorded
AOCI
Beginning balance	0	0	0
Net investment gains (losses) on investments arising during the period	0	2	0
Reclassification adjustment for (gains) losses included in net income	0	(2)	0
Impact of net unrealized investment (gains) losses	0	0	0
Ending balance	0	0	0
Net unrealized gains (losses) on investments on available-for-sale fixed maturity securities on which an allowance for credit losses has been recorded \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			0
Net Unrealized Investment Gains Losses On All Other Investments
AOCI
Beginning balance	240	2,369	723
Net investment gains (losses) on investments arising during the period	(591)	(795)	1,623
Reclassification adjustment for (gains) losses included in net income	15	(1,334)	9
Impact of net unrealized investment (gains) losses	0	0	0
Ending balance	(336)	240	2,369
Net Unrealized Investment Gains Losses On All Other Investments \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			14
DAC and Other Costs
AOCI
Beginning balance	(15)	(363)	(156)
Net investment gains (losses) on investments arising during the period	0	0	0
Reclassification adjustment for (gains) losses included in net income	0	0	0
Impact of net unrealized investment (gains) losses	9	348	(207)
Ending balance	(6)	(15)	(363)
DAC and Other Costs \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			0
Future Policy Benefits and Other Liabilities
AOCI
Beginning balance	(7)	(63)	(36)
Net investment gains (losses) on investments arising during the period	0	0	0
Reclassification adjustment for (gains) losses included in net income	0	0	0
Impact of net unrealized investment (gains) losses	6	56	(27)
Ending balance	(1)	(7)	(63)
Future Policy Benefits and Other Liabilities \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			0
Income Tax Benefit (Expense)
AOCI
Beginning balance	(47)	(409)	(115)
Net investment gains (losses) on investments arising during the period	125	167	(341)
Reclassification adjustment for (gains) losses included in net income	(4)	280	(2)
Impact of net unrealized investment (gains) losses	(3)	(85)	49
Ending balance	71	(47)	(409)
Income Tax Benefit (Expense) \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			0
Net Unrealized Investment Gains (Losses)
AOCI
Beginning balance	171	1,534	430
Net investment gains (losses) on investments arising during the period	(466)	(626)	1,282
Reclassification adjustment for (gains) losses included in net income	11	(1,056)	7
Impact of net unrealized investment (gains) losses	12	319	(185)
Ending balance	$ (272)	$ 171	1,534
Net Unrealized Investment Gains (Losses) \| Cumulative Effect, Period of Adoption, Adjustment
AOCI
Beginning balance			$ 0

Impact of net unrealized investment (gains) losses

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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- Definition

Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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- Definition

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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- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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