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Segments of Operations - Assets by segment (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Segment Reporting Information [Line Items]
Total assets	$ 32,353	$ 32,642
Property and Casualty Insurance
Segment Reporting Information [Line Items]
Total assets	27,527	27,654
Other
Segment Reporting Information [Line Items]
Total assets	$ 4,826	$ 4,988

X

- Definition

Amount of asset recognized for present right to economic benefit.

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