Non-U.S. Activities - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($)
Segment Reporting Information [Line Items]
Total assets	$ 372,693		$ 353,240
Non-U.S.
Segment Reporting Information [Line Items]
Management fees, percent	0.25	0.25
Service fees, percent	0.47	0.47
Total assets	$ 85,650	$ 86,400