Deferred Acquisition Costs and Deferred Sales Inducement Costs - Deferred Sales Inducement Costs (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2024	Dec. 31, 2023
Balances of and changes in DSIC
Beginning balance	$ 148	$ 167
Amortization	(4)	(19)
Ending balance	144	148
Variable Annuities
Balances of and changes in DSIC
Beginning balance	136	151
Amortization	(3)	(15)
Ending balance	133	136
Fixed Annuities
Balances of and changes in DSIC
Beginning balance	12	16
Amortization	(1)	(4)
Ending balance	$ 11	$ 12

Amount of deferred sale inducement cost capitalized on contract remaining in force.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2B
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479432/944-30-50-2B

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479432/944-30-50-2B

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 40
-Name Accounting Standards Codification
-Section 65
-Paragraph 2
-Subparagraph (g)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480016/944-40-65-2

Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 944
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479432/944-30-50-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479460/944-30-45-2

Name:	us-gaap_DeferredSalesInducementsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant