Non-U.S. Activities - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Segment Reporting [Line Items]
Total assets	$ 418,381			$ 366,047
Non-U.S.
Segment Reporting [Line Items]
Service fees, percent	0.50	0.49	0.48
Management fees, percent	0.23	0.24
Total assets	$ 95,850	$ 100,520	$ 100,520

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