Non-U.S. Activities - Schedule of Results From Non-U.S. Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total revenue	$ 11,945	$ 12,148	$ 12,027
Income before income tax expense	2,316	3,327	3,171
Non-U.S.
Segment Reporting Information [Line Items]
Total revenue	5,108	5,170	5,397
Income before income tax expense	1,057	1,358	1,590
U.S.
Segment Reporting Information [Line Items]
Total revenue	6,837	6,978	6,630
Income before income tax expense	$ 1,259	$ 1,969	$ 1,581