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Fair Values - Fund Interests Measured Based on Net Asset Value (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Measured Based on Net Asset Value
Carrying Value	$ 6,706	$ 6,206
Commitment	873	860
Private equity and other
Measured Based on Net Asset Value
Carrying Value	3,096	2,653
Commitment	655	644
Real estate
Measured Based on Net Asset Value
Carrying Value	3,537	3,461
Commitment	216	214
Hedge
Measured Based on Net Asset Value
Carrying Value	73	92
Commitment	$ 2	$ 2

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- Definition

Carrying value of investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

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No definition available.

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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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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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