XML 86 R74.htm IDEA: XBRL DOCUMENT v3.25.3

Commitments and Contingencies - Narrative (Details) T in Thousands				12 Months Ended
	Jun. 03, 2025 USD ($)	May 29, 2025 USD ($)	Aug. 09, 2024 USD ($)	Dec. 31, 2024 T	Sep. 30, 2025 USD ($)
Contingencies And Commitments [Line Items]
Threshold used for disclosing environmental matters involving potential monetary sanctions					$ 1,000,000
Jefferson Parish, Louisiana Landfill Litigation
Contingencies And Commitments [Line Items]
Loss contingency amount sought			$ 4,500,000
Maximum damages sought per plaintiff	$ 74,999
Chiquita Canyon, LLC
Contingencies And Commitments [Line Items]
Annual tons of waste accepted at landfill | T				2,300
Estimate of total new fees and other new taxes over the life of the conditional use permit					$ 300,000,000
Chiquita Canyon, LLC | County of Los Angeles Litigation
Contingencies And Commitments [Line Items]
Abatement Fund Amount Sought		$ 20,000,000

X

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-4

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 450
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483076/450-20-50-9

+ Details

Name:	us-gaap_LossContingencyDamagesSoughtValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The value (monetary amount) of the abatement fund the plaintiff seeks in the legal matter.

+ References

No definition available.

+ Details

Name:	wcn_AbatementFundAmountSought
Namespace Prefix:	wcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Annual tons of waste accepted at landfill

+ References

No definition available.

+ Details

Name:	wcn_AnnualTonsOfWasteAcceptedAtLandfill
Namespace Prefix:	wcn_
Data Type:	dtr-types:massItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	wcn_ContingenciesAndCommitmentsLineItems
Namespace Prefix:	wcn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Estimate of total new fees and other new taxes over the life of the conditional use permit

+ References

No definition available.

+ Details

Name:	wcn_EstimateOfTotalNewFeesAndOtherNewTaxesOverLifeOfConditionalUsePermit
Namespace Prefix:	wcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The maximum value (monetary amount) of the award the plaintiff seeks in the mass action legal matter, per plaintiff.

+ References

No definition available.

+ Details

Name:	wcn_MaximumDamagesPerPlaintiffSoughtValue
Namespace Prefix:	wcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Threshold used for disclosing environmental matters involving potential monetary sanctions

+ References

No definition available.

+ Details

Name:	wcn_ThresholdUsedForDisclosingEnvironmentalMattersInvolvingPotentialMonetarySanctions
Namespace Prefix:	wcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	srt_LitigationCaseAxis=wcn_JeffersonParishLouisianaLandfillLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=wcn_ChiquitaCanyonLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=wcn_CountyOfLosAngelesLitigationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: