Non-U.S. Activities - Schedule of Results from Non-U.S. Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Total revenue	$ 3,110	$ 2,953	$ 6,211	$ 6,034
Income before income tax expense	916	835	1,604	1,589
Non-U.S.
Segment Reporting Information [Line Items]
Total revenue	1,400	1,312	2,696	2,680
Income before income tax expense	433	396	692	756
U.S.
Segment Reporting Information [Line Items]
Total revenue	1,710	1,641	3,515	3,354
Income before income tax expense	$ 483	$ 439	$ 912	$ 833