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DISCONTINUED OPERATIONS - Cash flow information (Details) - GFL Infrastructure
$ in Millions
12 Months Ended
Dec. 31, 2022
CAD ($)
Disclosure of analysis of single amount of discontinued operations [line items]  
Operating cash flows from discontinued operations $ (35.4)
Investing cash flows from discontinued operations (7.2)
Financing cash flows from discontinued operations (1.0)
Decrease in cash from discontinued operations $ (43.6)