Statutory Financial Data and Restrictions - Schedule of Statutory Financial Data and Restrictions (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	$ 3,335	$ 3,779	$ 3,319
Statutory capital and surplus	29,300	30,230
Aggregate minimum required statutory capital and surplus	9,504	9,666
Domestic
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	1,594	1,912	2,272
Statutory capital and surplus	17,001	18,703
Aggregate minimum required statutory capital and surplus	3,763	3,625
Foreign
Statutory Accounting Practices [Line Items]
Statutory net income (loss)	1,741	1,867	$ 1,047
Statutory capital and surplus	12,299	11,527
Aggregate minimum required statutory capital and surplus	$ 5,741	$ 6,041

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

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Amount of statutory capital required to be maintained as of the balance sheet date under prescribed or permitted statutory accounting practices.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

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Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators.

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