Non-U.S. Activities - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Total assets	$ 290,816		$ 301,450
Non-U.S.
Segment Reporting Information [Line Items]
Management fees, percent	0.25	0.27
Service fees, percent	0.46	0.47
Total assets	$ 81,760	$ 94,680