Financial Instruments and Fair Value Measurements - Summary of marketable securities narrative (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||
| Pre-tax unrealized gain (loss) to be reclassified to earnings over the next twelve months | $ 5 | |
| Amount of marketable securities classified as cash and cash equivalents | $ 1,434 | $ 2,030 |