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v3.20.4

REVENUE (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 100.00% | 100.00%
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage Of Company-Wide Revenue | 100.00% | 100.00%
Other businesses |  |
Disaggregation of Revenue [Line Items] |  |
Percentage Of Company-Wide Revenue | 23.00% | 23.00%
Government Customer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 16.00% | 14.00%
Heavy Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 15.00% | 17.00%
Light Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 10.00% | 10.00%
Transportation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 5.00% | 5.00%
Healthcare Customer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 7.00% | 6.00%
Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 7.00% | 8.00%
Retail/Wholesale [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 8.00% | 7.00%
Contractors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 7.00% | 8.00%
Natural Resources [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 3.00% | 4.00%
Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 22.00% | 21.00%
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 100.00% | 100.00%
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage Of Company-Wide Revenue | 73.00% | 72.00%
United States | Government Customer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 21.00% | 18.00%
United States | Heavy Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 16.00% | 19.00%
United States | Light Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 13.00% | 12.00%
United States | Transportation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 5.00% | 6.00%
United States | Healthcare Customer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 10.00% | 7.00%
United States | Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 8.00% | 10.00%
United States | Retail/Wholesale [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 10.00% | 9.00%
United States | Contractors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 9.00% | 10.00%
United States | Natural Resources [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 2.00% | 3.00%
United States | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 6.00% | 6.00%
Canada |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 100.00% | 100.00%
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage Of Company-Wide Revenue | 4.00% | 5.00%
Canada | Government Customer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 9.00% | 6.00%
Canada | Heavy Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 18.00% | 20.00%
Canada | Light Manufacturing [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 7.00% | 6.00%
Canada | Transportation [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 10.00% | 8.00%
Canada | Healthcare Customer [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 0.00% | 0.00%
Canada | Commercial [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 9.00% | 9.00%
Canada | Retail/Wholesale [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 3.00% | 4.00%
Canada | Contractors [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 10.00% | 10.00%
Canada | Natural Resources [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 29.00% | 33.00%
Canada | Other [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Revenue From Contract With Customer, Excluding Assessed Tax, Percentage | 5.00% | 4.00%

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