Stock-based compensation (PSU Assumptions and Fair Value) (Details) - Share Units Plan - Equity Settled Awards - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| PSU-ROIC | |||
| Assumptions (1) | |||
| Stock price (in dollars per share) | $ 143.38 | $ 166.67 | $ 157.91 |
| Expected stock price volatility | 18.00% | 20.00% | 26.00% |
| Expected term (years) | 3 years | 3 years | 3 years |
| Risk-free interest rate | 2.55% | 3.80% | 3.38% |
| Dividend rate (in dollars per share) | $ 3.56 | $ 3.38 | $ 3.16 |
| Weighted-average grant date fair value (in dollars per share) | 143.37 | 166.63 | 89.37 |
| PSU-TSR | |||
| Assumptions (1) | |||
| Weighted-average grant date fair value (in dollars per share) | 186.96 | 217.75 | 174.04 |
| RSUs | |||
| Assumptions (1) | |||
| Weighted-average grant date fair value (in dollars per share) | $ 143.68 | $ 166.64 | $ 142.39 |