Non-U.S. Activities - Schedule of Results from Non-U.S. Operations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Total revenue	$ 3,081	$ 2,950
Income before income tax expense	754	627
Non-U.S.
Segment Reporting Information [Line Items]
Total revenue	1,378	1,345
Income before income tax expense	361	337
U.S.
Segment Reporting Information [Line Items]
Total revenue	1,703	1,605
Income before income tax expense	$ 393	$ 290