XML 122 R102.htm IDEA: XBRL DOCUMENT v3.22.0.1

Employee Benefit Plans (Plan Contributions) (Details) - USD ($) $ in Thousands			3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2018	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Multiemployer Plans [Line Items]
Company contributions					$ 15,251		$ 14,592		$ 14,110
Local 731 I b Of T Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number					36-6513567 - 001
Pension Protection Act zone status			Green					Green
FIP/RP status					NA
Company contributions					$ 4,504		$ 4,628		4,570
Collective-bargaining agreement, expiration date					Sep. 30, 2023
Western Conference of Teamsters Pension Trust [Member]
Multiemployer Plans [Line Items]
Registration number					91-6145047 - 001
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 4,963		$ 4,841		4,550
International Union of Operating Engineers Pension Trust [Member]
Multiemployer Plans [Line Items]
Registration number					85512-1
Pension Protection Act zone status	Green	Green
FIP/RP status					NA
Company contributions					$ 295		$ 279		238
Multi-Sector Pension Plan [Member]
Multiemployer Plans [Line Items]
Registration number					1085653
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 265		$ 196		202
Collective-bargaining agreement, expiration date					Dec. 31, 2023
Midwest Operating Engineers Pension Plan [Member]
Multiemployer Plans [Line Items]
Registration number					36-6140097 - 001
Pension Protection Act zone status				Green		Green
FIP/RP status					NA
Company contributions					$ 424		$ 316		339
Collective-bargaining agreement, expiration date					Oct. 31, 2025
Locals 302 & 612 of the IOUE - Employers Construction Industry Retirement Plan [Member]
Multiemployer Plans [Line Items]
Registration number					91-6028571 - 001
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 313		$ 298		290
Collective-bargaining agreement, expiration date					Nov. 16, 2022
Suburban Teamsters of Northern Illinois Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number					36-6155778 - 001
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 2,300		$ 2,080		1,844
Collective-bargaining agreement, expiration date					Feb. 29, 2024
Teamster Local 301 Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number					36-6492992 - 001
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 841		$ 673		624
Collective-bargaining agreement, expiration date					Sep. 30, 2023
Automobile Mechanics' Local No. 701 Union and Industry Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number					36-6042061 - 001
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 439		$ 457		492
Collective-bargaining agreement, expiration date					Dec. 31, 2022
IAM National Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number					51-6031295 - 002
Pension Protection Act zone status					Red		Red
FIP/RP status					NA
Company contributions					$ 299		$ 310		256
Collective-bargaining agreement, expiration date					Dec. 31, 2022
Local 813 Pension Trust Fund [Member]
Multiemployer Plans [Line Items]
Registration number					13-1975659 - 001
Pension Protection Act zone status					Red		Red
FIP/RP status					Implemented
Company contributions					$ 258		$ 183		281
Collective-bargaining agreement, expiration date					Nov. 30, 2022
Recycling and General Industrial Union Local 108 Pension Fund [Member]
Multiemployer Plans [Line Items]
Registration number					13-6366378
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 217		$ 269		337
Collective-bargaining agreement, expiration date					Feb. 28, 2022
Nurses and Local 813 IBT Retirement Plan [Member]
Multiemployer Plans [Line Items]
Registration number					13-3628926 - 001
Pension Protection Act zone status					Green		Green
FIP/RP status					NA
Company contributions					$ 58		$ 52		87
Collective-bargaining agreement, expiration date					Nov. 30, 2022
Other Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Company contributions					$ 75		$ 10		$ 0
Minimum [Member] | Western Conference of Teamsters Pension Trust [Member]
Multiemployer Plans [Line Items]
Collective-bargaining agreement, expiration date					Dec. 31, 2021
Minimum [Member] | International Union of Operating Engineers Pension Trust [Member]
Multiemployer Plans [Line Items]
Collective-bargaining agreement, expiration date					Mar. 31, 2021
Maximum [Member] | Western Conference of Teamsters Pension Trust [Member]
Multiemployer Plans [Line Items]
Collective-bargaining agreement, expiration date					Jun. 30, 2025
Maximum [Member] | International Union of Operating Engineers Pension Trust [Member]
Multiemployer Plans [Line Items]
Collective-bargaining agreement, expiration date					Mar. 31, 2024

X

- Definition

Amount of cost for employer contribution to multiemployer plan. Multiemployer plan includes, but is not limited to, pension plan determined to be individually significant and insignificant and other postretirement benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=29639808&loc=d3e29008-114946

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947

+ Details

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

X

- Definition

Indicates certified zone status of multiemployer pension plan determined to be individually significant. Acceptable values are "Green", "Yellow", "Orange", "Red", "Other", and "NA".

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

Name:	us-gaap_MultiemployerPlanPensionSignificantCertifiedZoneStatusFixedList
Namespace Prefix:	us-gaap_
Data Type:	us-types:zoneStatusItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Expiration date of collective-bargaining arrangement (CBA) requiring contribution to multiemployer pension plan determined to be individually significant, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

Name:	us-gaap_MultiemployerPlanPensionSignificantCollectiveBargainingArrangementExpirationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Indicates whether funding improvement plan or rehabilitation plan was implemented or pending for multiemployer pension plan, determined to be individually significant. Acceptable values are "No", "Pending", "Implemented", "Other", and "NA".

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=35742348&loc=SL14450788-114948

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (f)(1)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

Name:	us-gaap_MultiemployerPlanPensionSignificantFundingImprovementOrRehabilitationPlanImplementationStatusFixedList
Namespace Prefix:	us-gaap_
Data Type:	us-types:fundingImprovementAndRehabilitationPlanItemType
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:	us-gaap_MultiemployerPlansLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Registration Number

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_Local731IBOfTPensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_WesternConferenceOfTeamstersPensionTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_InternationalUnionOfOperatingEngineersPensionTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_MultiSectorPensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_MidwestOperatingEngineersPensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_Locals302612OfIoueEmployersConstructionIndustryRetirementPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_SuburbanTeamstersOfNorthernIllinoisPensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_TeamsterLocal301PensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_AutomobileMechanicsLocalNo.701UnionAndIndustryPensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_IaMNationalPensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_Local813PensionTrustFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_RecyclingAndGeneralIndustrialUnionLocal108PensionFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_NursesAndLocal813IbtRetirementPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_RetirementPlanNameAxis=wcn_OtherMultiemployerPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: