Segment Information - Schedule of Assets for Segments and Corporate and Other (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Segment Reporting [Line Items]
Assets	$ 87,363	$ 88,083
Enact
Segment Reporting [Line Items]
Assets	6,961	6,895
Closed Block
Segment Reporting [Line Items]
Assets	$ 79,062	$ 79,615

Amount of asset recognized for present right to economic benefit.

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+ Details

- Definition

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.

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+ Details