XML 78 R65.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Fair Value Measurements (Narrative) (Detail) - $ / gal | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Fair Value [Abstract] |  |
Minimum range of DOE index curve used in DCF model | 2.71 | 2.61
Maximum range of DOE index curve used in DCF model | 2.80 | 2.78
Weighted average DOE index curve used in DCF model | 2.74 | 2.75

X
- References No definition available. + Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum range of DOE index curve used in DCF model. + References No definition available. + Details
Name: | wcn_MaximumRangeOfDoeIndexCurveUsedInDcfModel
Namespace Prefix: | wcn_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum range of DOE index curve used in DCF model. + References No definition available. + Details
Name: | wcn_MinimumRangeOfDoeIndexCurveUsedInDcfModel
Namespace Prefix: | wcn_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Weighted average Doe index curve used in DCF Model. + References No definition available. + Details
Name: | wcn_WeightedAverageOfDoeIndexCurveUsedInDcfModel
Namespace Prefix: | wcn_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | instant