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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2021
Feb. 04, 2022
Jun. 30, 2021
Document Document and Entity Information [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Document Transition Report false    
Entity File Number 1-34370    
Entity Registrant Name WASTE CONNECTIONS, INC.    
Entity Incorporation, State or Country Code A6    
Entity Tax Identification Number 98-1202763    
Entity Address, Address Line One 6220 Hwy 7, Suite 600    
Entity Address, City or Town Woodbridge    
Entity Address, State or Province ON    
Entity Address, Country CA    
Entity Address, Postal Zip Code L4H 4G3    
City Area Code (905)    
Local Phone Number 532-7510    
Title of 12(b) Security Common Shares, no par value    
Trading Symbol WCN    
Security Exchange Name NYSE    
Entity Well Known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Auditor Name GRANT THORNTON LLP    
Auditor Firm ID 248    
Auditor Location Houston, Texas    
Entity Shell Company false    
Entity Public Float     $ 31,023,478,489
Entity Common Stock, Shares Outstanding   257,332,581  
Entity Central Index Key 0001318220    
Current Fiscal Year End Date --12-31    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2021    
Amendment Flag false