Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Time deposits	$ 2,980
Time deposits in amounts of $250,000 or more	2,970	$ 1,310
Time deposit liability, uninsured, maturity, three months or less	500
Time deposit liability, uninsured, maturity, over three months through six months	1,500
Time deposit liability, uninsured, maturity, over 6 months through 12 months	980
Demand deposit overdrafts	2,800	3,110
Non-U.S.
Loans and Leases Receivable Disclosure [Line Items]
Time deposits	$ 100	$ 1,310