RETIREMENT BENEFITS PLANS - Components of Pension Plans with Accumulated and Projected Benefit Obligation in Excess of Plan Assets (Details) - Pension plans - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| United States | ||
| Components of pension plans with an accumulated benefit obligation in excess of plan assets | ||
| Accumulated benefit obligation | $ 2,650 | $ 2,686 |
| Fair value of plan assets | 2,469 | 2,445 |
| Components of pension plans with a projected benefit obligation in excess of plan assets | ||
| Projected benefit obligation | 2,650 | 2,700 |
| Fair value of plan assets | 2,469 | 2,445 |
| Non-United States plans | ||
| Components of pension plans with an accumulated benefit obligation in excess of plan assets | ||
| Accumulated benefit obligation | 640 | 701 |
| Fair value of plan assets | 121 | 209 |
| Components of pension plans with a projected benefit obligation in excess of plan assets | ||
| Projected benefit obligation | 738 | 772 |
| Fair value of plan assets | $ 166 | $ 225 |