Exit and Implementation Costs (Movement in Exit and Implementation Costs) (Details) - Initiative [Member] - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
|
| Restructuring Reserve [Roll Forward] | ||
| Restructuring reserve, beginning of period | $ 34 | $ 57 |
| Restructuring and Related Cost, Incurred Cost | 43 | 56 |
| Payments for restructuring | 40 | 79 |
| Restructuring reserve, end of period | 37 | 34 |
| Exit Costs [Member] | ||
| Restructuring Reserve [Roll Forward] | ||
| Restructuring reserve, beginning of period | 25 | 35 |
| Restructuring and Related Cost, Incurred Cost | 24 | 8 |
| Payments for restructuring | 17 | 18 |
| Restructuring reserve, end of period | 32 | 25 |
| Implementation Costs [Member] | ||
| Restructuring Reserve [Roll Forward] | ||
| Restructuring reserve, beginning of period | 9 | 22 |
| Restructuring and Related Cost, Incurred Cost | 19 | 48 |
| Payments for restructuring | 23 | 61 |
| Restructuring reserve, end of period | $ 5 | $ 9 |