Consolidated Statement of Cash Flows (Parenthetical) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Statement Of Cash Flows [Line Items] | ||
| Money market paper in financial assets at fair value not held for trading | $ 6,922 | $ 2,431 |
| Money market paper in other financial assets measured at amortized cost | 377 | 340 |
| Money market paper in financial assets measured at fair value through other comprehensive income | 0 | 140 |
| Money market paper in financial assets at fair value held for trading | 31 | $ 127 |
| Swisscard | ||
| Statement Of Cash Flows [Line Items] | ||
| Cash proceeds | $ 506 | |
| Proportion of ownership interest in joint venture | 50.00% |