Business Segments - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lease revenue	$ 188	$ 238	$ 392	$ 466
Payment Services [Member]
Rewards and Rebate Costs and Certain Partner Payments Included in Noninterest Income	772	633	1,400	1,200
Revenue generated from certain contracts with customers included in non-interest income	$ 2,000	$ 1,900	$ 3,900	$ 3,600