Non-U.S. Activities - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Total assets	$ 303,568		$ 303,568		$ 314,624
Non-U.S.
Segment Reporting Information [Line Items]
Management fees, percent	0.25	0.26	0.26	0.26
Service fees, percent	0.45	0.48	0.46	0.48
Total assets	$ 91,230	$ 96,280	$ 91,230	$ 96,280