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Segment Information - Depreciation by Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2025 | Dec. 29, 2024 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |
Consolidated depreciation expense | $ 111,512 | $ 108,703 | $ 118,776
Cost of Sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Consolidated depreciation expense | 110,009 | 106,013 | 114,125
Operating Segments | Cost of Sales | U.S. Gas |  |  |
Segment Reporting Information [Line Items] |  |  |
Consolidated depreciation expense | 42,802 | 45,213 | 45,895
Operating Segments | Cost of Sales | Canadian Operations |  |  |
Segment Reporting Information [Line Items] |  |  |
Consolidated depreciation expense | 5,792 | 6,206 | 5,954
Operating Segments | Cost of Sales | Union Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Consolidated depreciation expense | 29,839 | 27,880 | 35,108
Operating Segments | Cost of Sales | Non-Union Electric |  |  |
Segment Reporting Information [Line Items] |  |  |
Consolidated depreciation expense | $ 31,576 | $ 26,714 | $ 27,168

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