Non-U.S. Activities - Schedule of Results from Non-U.S. Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 3,259	$ 2,691	$ 9,588	$ 8,902
Income before income tax expense	925	511	2,435	2,115
Non-U.S.
Segment Reporting Information [Line Items]
Total revenue	1,339	1,081	4,071	3,777
Income before income tax expense	326	130	968	819
U.S.
Segment Reporting Information [Line Items]
Total revenue	1,920	1,610	5,517	5,125
Income before income tax expense	$ 599	$ 381	$ 1,467	$ 1,296