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Shareholders' Equity (Summary of Vesting Activity Related to Restricted Share Units) (Details) - Restricted Stock Units (RSUs) [Member] | 9 Months Ended
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Sep. 30, 2019 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Forfeited | (46,503)
Progressive Waste Solutions Ltd. [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Vested at beginning | 120,153
Vested over remaining service period | 2,106
Cash settled | (46,023)
Forfeited | (2,352)
Vested at ending | 73,884

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- 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
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Balance Type: | na
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Cash Settled In Period + References No definition available. + Details
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Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition As of the balance sheet date, the number of shares into which fully vested share based awards can be converted. + References No definition available. + Details
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Namespace Prefix: | wcn_
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Balance Type: | na
Period Type: | instant

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- Details
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |