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Net Income Per Share Information - Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$ 209,208	$ 224,074	$ 407,021	$ 404,398
Denominator:
Basic shares outstanding	257,596,993	257,179,434	257,485,587	257,555,033
Dilutive effect of equity-based awards	513,498	557,311	564,763	585,681
Diluted shares outstanding	258,110,491	257,736,745	258,050,350	258,140,714

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