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REVENUE - Disaggregation of Revenues (Details) | 3 Months Ended | 6 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 100.00% | 100.00% | 100.00% | 100.00%
Percent of total company revenue | 100.00% | 100.00% | 100.00% | 100.00%
Segment Reporting, Reconciling Item, Corporate Nonsegment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total company revenue (as a percent) | 2.00% | 2.00% | 2.00% | 2.00%
Manufacturing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 30.00% | 31.00% | 30.00% | 31.00%
Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 16.00% | 16.00% | 15.00% | 16.00%
Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 9.00% | 9.00% | 9.00% | 9.00%
Commercial Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 8.00% | 8.00% | 8.00% | 8.00%
Contractors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 7.00% | 6.00% | 7.00% | 6.00%
Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 6.00% | 6.00% | 6.00% | 6.00%
Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 4.00% | 4.00% | 4.00% | 4.00%
Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 4.00% | 4.00% | 4.00% | 4.00%
Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 3.00% | 3.00% | 3.00% | 3.00%
Warehousing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 2.00% | 2.00% | 2.00% | 2.00%
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 11.00% | 11.00% | 12.00% | 11.00%
High-Touch Solutions N.A. |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 100.00% | 100.00% | 100.00% | 100.00%
Percent of total company revenue | 78.00% | 80.00% | 78.00% | 80.00%
High-Touch Solutions N.A. | Manufacturing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 30.00% | 31.00% | 30.00% | 31.00%
High-Touch Solutions N.A. | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 19.00% | 19.00% | 19.00% | 19.00%
High-Touch Solutions N.A. | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 7.00% | 7.00% | 7.00% | 7.00%
High-Touch Solutions N.A. | Commercial Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 7.00% | 7.00% | 7.00% | 7.00%
High-Touch Solutions N.A. | Contractors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 6.00% | 5.00% | 5.00% | 5.00%
High-Touch Solutions N.A. | Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 7.00% | 7.00% | 8.00% | 7.00%
High-Touch Solutions N.A. | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 4.00% | 4.00% | 4.00% | 4.00%
High-Touch Solutions N.A. | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 4.00% | 4.00% | 4.00% | 4.00%
High-Touch Solutions N.A. | Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 3.00% | 3.00% | 3.00% | 3.00%
High-Touch Solutions N.A. | Warehousing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 3.00% | 3.00% | 3.00% | 3.00%
High-Touch Solutions N.A. | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 10.00% | 10.00% | 10.00% | 10.00%
Endless Assortment |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 100.00% | 100.00% | 100.00% | 100.00%
Percent of total company revenue | 20.00% | 18.00% | 20.00% | 18.00%
Endless Assortment | Manufacturing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 30.00% | 30.00% | 30.00% | 29.00%
Endless Assortment | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 3.00% | 3.00% | 3.00% | 3.00%
Endless Assortment | Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 18.00% | 18.00% | 18.00% | 18.00%
Endless Assortment | Commercial Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 12.00% | 12.00% | 12.00% | 12.00%
Endless Assortment | Contractors |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 12.00% | 12.00% | 12.00% | 11.00%
Endless Assortment | Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 1.00% | 2.00% | 1.00% | 1.00%
Endless Assortment | Retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 4.00% | 4.00% | 4.00% | 4.00%
Endless Assortment | Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 2.00% | 2.00% | 2.00% | 2.00%
Endless Assortment | Utilities |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 2.00% | 2.00% | 2.00% | 2.00%
Endless Assortment | Warehousing |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 0.00% | 0.00% | 1.00% | 1.00%
Endless Assortment | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total net sales (as a percent) | 16.00% | 15.00% | 15.00% | 17.00%

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