Consolidated Statements of Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Liability for Future Policy Benefit, Remeasurement Gain (Loss)	$ 64	$ 147	$ 298	$ 233

Amount of remeasurement gain (loss) on liability for future policy benefit from application of revised benefit ratio as of contract issue. Includes, but is not limited to, remeasurement gain (loss) for annuitization insurance benefit, death and other insurance benefits, and traditional and limited-payment contracts.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 45
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=124509262&loc=SL117780257-158436

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124509262&loc=d3e14722-158436

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124509262&loc=d3e14714-158436

Name:	us-gaap_LiabilityForFuturePolicyBenefitRemeasurementGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration