Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Statement of Cash Flows [Abstract] | ||
| Sales of premises and equipment | $ 1 | $ 1 |
| Net increase in short-term borrowings, non-cash | 117 | |
| Net increase in loans and Card Member receivables, non-cash | $ 117 | |