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v3.25.3

Segment Information - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 5,737.4 | $ 5,516.6 | $ 16,913.1 | $ 15,812.7
Percentage of Total Net Sales | 100.00% | 100.00% | 100.00% | 100.00%
Transferred at a point in time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 4,867.5 | $ 4,721.0 | $ 14,446.5 | $ 13,561.6
Transferred at a point in time where CDW is agent |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 452.3 | 428.1 | 1,270.9 | 1,194.1
Transferred over time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 417.6 | 367.5 | 1,195.7 | 1,057.0
Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 2,255.4 | 2,161.2 | 7,072.9 | 6,492.3
Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 433.8 | 379.7 | 1,269.7 | 1,143.5
Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 744.7 | 691.0 | 1,939.0 | 1,873.4
Education |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 911.2 | 995.7 | 2,470.3 | 2,609.9
Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 693.9 | 649.0 | 2,110.3 | 1,820.4
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 698.4 | 640.0 | 2,050.9 | 1,873.2
Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 4,088.5 | $ 3,958.6 | $ 12,274.8 | $ 11,566.6
Percentage of Total Net Sales | 71.30% | 71.80% | 72.50% | 73.10%
Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 1,093.6 | $ 1,048.3 | $ 3,032.1 | $ 2,778.3
Percentage of Total Net Sales | 19.10% | 19.00% | 17.90% | 17.60%
Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 525.6 | $ 481.9 | $ 1,520.1 | $ 1,386.1
Percentage of Total Net Sales | 9.20% | 8.70% | 9.00% | 8.80%
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 29.7 | $ 27.8 | $ 86.1 | $ 81.7
Percentage of Total Net Sales | 0.40% | 0.50% | 0.60% | 0.50%
Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 2,255.4 | $ 2,161.2 | $ 7,072.9 | $ 6,492.3
Corporate | Transferred at a point in time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 1,884.2 | 1,799.8 | 5,928.4 | 5,409.5
Corporate | Transferred at a point in time where CDW is agent |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 198.9 | 197.5 | 616.3 | 585.5
Corporate | Transferred over time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 172.3 | 163.9 | 528.2 | 497.3
Corporate | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 2,255.4 | 2,161.2 | 7,072.9 | 6,492.3
Corporate | Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Corporate | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Corporate | Education |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Corporate | Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Corporate | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Corporate | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 1,521.8 | 1,468.6 | 4,875.6 | 4,466.4
Corporate | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 492.8 | 458.4 | 1,460.7 | 1,312.1
Corporate | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 224.9 | 218.9 | 689.5 | 668.1
Corporate | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 15.9 | 15.3 | 47.1 | 45.7
Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 433.8 | 379.7 | 1,269.7 | 1,143.5
Small Business | Transferred at a point in time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 373.6 | 328.1 | 1,106.5 | 997.0
Small Business | Transferred at a point in time where CDW is agent |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 44.6 | 37.0 | 116.1 | 110.3
Small Business | Transferred over time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 15.6 | 14.6 | 47.1 | 36.2
Small Business | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Small Business | Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 433.8 | 379.7 | 1,269.7 | 1,143.5
Small Business | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Small Business | Education |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Small Business | Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Small Business | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Small Business | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 332.8 | 294.7 | 994.4 | 902.0
Small Business | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 73.8 | 60.3 | 195.8 | 173.7
Small Business | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 22.4 | 20.4 | 65.8 | 54.7
Small Business | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 4.8 | 4.3 | 13.7 | 13.1
Public |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 2,349.8 | 2,335.7 | 6,519.6 | 6,303.7
Public | Transferred at a point in time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 2,022.1 | 2,053.4 | 5,689.3 | 5,561.3
Public | Transferred at a point in time where CDW is agent |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 170.9 | 160.0 | 417.0 | 402.7
Public | Transferred over time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 156.8 | 122.3 | 413.3 | 339.7
Public | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Public | Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Public | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 744.7 | 691.0 | 1,939.0 | 1,873.4
Public | Education |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 911.2 | 995.7 | 2,470.3 | 2,609.9
Public | Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 693.9 | 649.0 | 2,110.3 | 1,820.4
Public | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Public | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 1,714.2 | 1,742.8 | 4,903.2 | 4,855.4
Public | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 435.1 | 427.0 | 1,079.5 | 992.6
Public | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 195.1 | 161.0 | 522.7 | 441.6
Public | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 5.4 | 4.9 | 14.2 | 14.1
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 698.4 | 640.0 | 2,050.9 | 1,873.2
Other | Transferred at a point in time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 587.6 | 539.7 | 1,722.3 | 1,593.8
Other | Transferred at a point in time where CDW is agent |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 37.9 | 33.6 | 121.5 | 95.6
Other | Transferred over time where CDW is principal |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 72.9 | 66.7 | 207.1 | 183.8
Other | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Other | Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Other | Government |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Other | Education |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Other | Healthcare |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 0.0 | 0.0 | 0.0 | 0.0
Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 698.4 | 640.0 | 2,050.9 | 1,873.2
Other | Hardware |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 519.7 | 452.5 | 1,501.6 | 1,342.8
Other | Software |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 91.9 | 102.6 | 296.1 | 299.9
Other | Services |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 83.2 | 81.6 | 242.1 | 221.7
Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 3.6 | 3.3 | 11.1 | 8.8
United States |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 5,023.2 | 4,863.1 | 14,793.4 | 13,892.8
United States | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 2,243.0 | 2,149.4 | 7,014.7 | 6,448.0
United States | Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 427.8 | 373.0 | 1,250.3 | 1,125.9
United States | Public |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 2,346.8 | 2,333.8 | 6,511.7 | 6,298.6
United States | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 5.6 | 6.9 | 16.7 | 20.3
Rest of World |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 714.2 | 653.5 | 2,119.7 | 1,919.9
Rest of World | Corporate |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 12.4 | 11.8 | 58.2 | 44.3
Rest of World | Small Business |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 6.0 | 6.7 | 19.4 | 17.6
Rest of World | Public |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | 3.0 | 1.9 | 7.9 | 5.1
Rest of World | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total Net sales | $ 692.8 | $ 633.1 | $ 2,034.2 | $ 1,852.9

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