Non-U.S. Activities - Schedule of Results from Non-U.S. Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Total revenue	$ 3,138	$ 3,101
Income before income tax expense	598	688
Non-U.S.
Segment Reporting Information [Line Items]
Total revenue	1,344	1,283
Income before income tax expense	279	252
U.S.
Segment Reporting Information [Line Items]
Total revenue	1,794	1,818
Income before income tax expense	$ 319	$ 436