Non-U.S. Activities - Schedule of Results from Non-U.S. Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Total revenue	$ 2,959	$ 2,990	$ 8,993	$ 8,974
Income before income tax expense	849	876	2,438	2,441
Non-U.S.
Segment Reporting Information [Line Items]
Total revenue	1,216	1,337	3,903	4,002
Income before income tax expense	311	410	1,059	1,146
U.S.
Segment Reporting Information [Line Items]
Total revenue	1,743	1,653	5,090	4,972
Income before income tax expense	$ 538	$ 466	$ 1,379	$ 1,295