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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Numerator:
Net income attributable to Waste Connections for basic and diluted earnings per share	$ 224,074	$ 177,047	$ 404,398	$ 337,356
Denominator:
Basic shares outstanding	257,179,434	260,951,405	257,555,033	261,791,088
Dilutive effect of equity-based awards	557,311	467,168	585,681	478,512
Diluted shares outstanding	257,736,745	261,418,573	258,140,714	262,269,600