Fair Value Disclosures - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Investments excluded from Fair Value Hierarchy, net asset value practical expedient	$ 584	$ 535
Carrying value of unfunded commitments	$ 354	$ 304

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/2003/role/exampleRef
-Topic 820
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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