| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Revenues |
| Electric Power Infrastructure Services | | | | | | 5,599.8 | | 4,937.3 |
| Oil and Gas Infrastructure Services | | | | | | | | 2,635.1 |
| |
| EBITDA |
| Electric Power Infrastructure Services | | | | | | 518.1 | 395.7 | 362.3 |
| Oil and Gas Infrastructure Services | | | | | | | | 142.9 |
| |
| EBIT |
| Electric Power Infrastructure Services | | | | | | 518.1 | 395.7 | 362.3 |
| Oil and Gas Infrastructure Services | | | | | | | | 142.9 |
| |
| Mix |
| Electric Power Infrastructure Services | | | | | | 59.2% | | 65.2% |
| Oil and Gas Infrastructure Services | | | | | | | | 34.8% |
| |
| Growth |
| Electric Power Infrastructure Services | | | | | | | | -6.9% |
| Oil and Gas Infrastructure Services | | | | | | | | 7.8% |