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FAIR VALUE - Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 33,912,000,000	$ 33,912,000,000	$ 28,908,000,000
Transfer in and/or (out) of Level 3	0	0
Other invested assets	1,348,000,000	1,348,000,000	1,171,000,000
Investments | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other invested assets	242,000,000	242,000,000	239,000,000
Fixed maturities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 2,400,000,000	$ 2,400,000,000	$ 2,200,000,000

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