| Assets | — | — |
| Current assets | — | — |
| Cash and equivalents | 62.37a | 78.4a |
| Accounts receivable, net of allowance for credit losses of $25,730 and $23,553 at December 31, 2024 and 2023, respectively | 935.03a | 856.95a |
| Prepaid expenses and other current assets | 229.52a | 206.43a |
| Total current assets | 1,226.91a | 1,141.79a |
| Restricted cash | 135.81a | 105.64a |
| Restricted investments | 78.13a | 70.35a |
| Property and equipment, net | 8,035.93a | 7,228.33a |
| Operating lease right-of-use assets | 308.2a | 261.78a |
| Goodwill | 7,950.41a | 7,404.4a |
| Intangible assets, net | 1,991.62a | 1,603.54a |
| Other assets, net | 90.81a | 100.05a |
| Total assets | 19,817.81a | 17,915.88a |
| Liabilities and equity | — | — |
| Current liabilities | — | — |
| Accounts payable | 637.37a | 642.46a |
| Book overdraft | 14.63a | 14.86a |
| Deferred revenue | 382.5a | 355.2a |
| Accrued liabilities | 736.82a | 521.43a |
| Current portion of operating lease liabilities | 40.49a | 32.53a |
| Current portion of contingent consideration | 59.17a | 95a |
| Current portion of long-term debt and notes payable | 7.85a | 26.46a |
| Total current liabilities | 1,878.83a | 1,687.93a |
| Long-term portion of debt and notes payable | 8,072.93a | 6,724.77a |
| Long-term portion of operating lease liabilities | 272.11a | 238.44a |
| Long-term portion of contingent consideration | 27.99a | 20.03a |
| Deferred income taxes | 958.34a | 1,022.48a |
| Other long-term liabilities | 747.25a | 524.44a |
| Total liabilities | 11,957.46a | 10,218.1a |
| Equity | — | — |
| Common shares | 3,283.16a | 3,276.66a |
| Additional paid-in capital | 325.93a | 284.28a |
| Accumulated other comprehensive loss | -205.74a | -9.83a |
| Treasury shares | 0a | 0a |
| Retained earnings | 4,457.01a | 4,141.69a |
| Total Waste Connections’ equity | 7,860.35a | 7,692.81a |
| Noncontrolling interest in subsidiaries | 0a | 4.97a |
| Total equity | 7,860.35a | 7,697.78a |
| Total liabilities and equity | 19,817.81a | 17,915.88a |