Deferred Policy Acquisition Costs (Balance of and Changes in DSI) (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Movement in Deferred Sales Inducements [Roll Forward]
Balance, EOP	$ 389	$ 425
Individual Retirement Strategies \| Individual Variable
Movement in Deferred Sales Inducements [Roll Forward]
Balance, BOP	376	410
Capitalization	1	1
Amortization expense	(16)	(17)
Balance, EOP	361	394
Other businesses
Movement in Deferred Sales Inducements [Roll Forward]
Balance, EOP	$ 28	$ 31

Amount of amortization expense (reversal of expense) for deferred sales inducement cost.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479868/944-20-45-2

Reference 2: 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 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 (b)
-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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration