Leases - Supplemental Cash Flow Information and Non-Cash Activity Related to Operating Leases (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Leases [Abstract] | ||
| Right-of-use assets obtained in exchange for new operating lease liabilities | $ 205 | $ 781 |
| Right-of-use assets obtained in exchange for new finance lease liabilities | 39 | 40 |
| Other non-cash increases in operating lease right-of-use assets | 3 | 69 |
| Other non-cash decrease in financing lease right-of-use assets | $ (8) | $ (5) |