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Segment Information
 9 Months Ended
Sep. 30, 2025
Segment Reporting [Abstract]  
Segment Information Segment Information
The Company has three reportable segments: Corporate, Small Business, and Public. In addition, there are two other operating segments: CDW UK and CDW Canada, both of which do not meet the reportable segment quantitative thresholds and, accordingly, are included in an all other category (“Other”). The organizational structure of the Company’s segments is determined based on how the chief operating decision maker (“CODM”), who is the Chief Executive Officer, evaluates performance, allocates resources and manages operations, which is primarily based on customer base. Specifically, the Corporate reportable segment is primarily comprised of private sector business customers with more than 250 employees in the US, the Small Business reportable segment is primarily comprised of private sector business customers with up to 250 employees in the US, and the Public reportable segment is comprised of government agencies and education and healthcare institutions in the US.
The accounting policies used to determine profit and loss measures are consistent across all reportable segments and on a consolidated basis. Additionally, the CODM reviews key profit and loss measures for each reportable segment consistently based on both segment Gross profit and Operating income. Specifically, the CODM reviews Gross profit by segment to evaluate forecasting and overall profitability performance and Operating income by segment to make investment strategy and performance-based compensation decisions. Segment information for Total assets and capital expenditures is not presented given that such information is not used in measuring segment performance or allocating resources between segments.
The Company has centralized logistics and headquarters functions that provide services to the segments. The logistics function includes purchasing, distribution and fulfillment services to support the Corporate, Small Business and Public segments. As a result, costs and intercompany charges associated with the logistics function are fully allocated to all of these segments based on a percent of Net sales. The centralized headquarters function provides services in areas such as accounting, information technology, marketing, legal and coworker services. Headquarters function costs that are not allocated to the segments are included under the heading of “Headquarters” in the tables below.
Information about the Company’s segments for both the three and nine months ended September 30, 2025 and 2024 is as follows:
CorporateSmall BusinessPublicOtherHeadquartersTotal
Three Months Ended September 30, 2025
Net sales$2,255.4 $433.8 $2,349.8 $698.4 $— $5,737.4 
Cost of sales1,734.0 334.7 1,859.7 553.5 — 4,481.9 
Gross profit521.4 99.1 490.1 144.9 — 1,255.5 
Other segment expense items(1)
326.1 45.4 258.2 101.9 80.6 812.2 
Operating income (loss)$195.3 $53.7 $231.9 $43.0 $(80.6)$443.3 
Other Segment Information(2)
Depreciation and amortization expense$29.0 $2.1 $19.3 $7.3 $15.6 $73.3 
Three Months Ended September 30, 2024
Net sales$2,161.2 $379.7 $2,335.7 $640.0 $— $5,516.6 
Cost of sales1,651.0 291.5 1,858.9 514.5 — 4,315.9 
Gross profit510.2 88.2 476.8 125.5 — 1,200.7 
Other segment expense items(1)
301.2 42.6 236.6 93.0 45.7 719.1 
Operating income (loss)$209.0 $45.6 $240.2 $32.5 $(45.7)$481.6 
Other Segment Information(2)
Depreciation and amortization expense$18.8 $0.9 $14.2 $6.9 $28.3 $69.1 
Nine Months Ended September 30, 2025
Net sales$7,072.9 $1,269.7 $6,519.6 $2,050.9 $— $16,913.1 
Cost of sales5,444.1 987.4 5,230.8 1,631.8 — 13,294.1 
Gross profit1,628.8 282.3 1,288.8 419.1 — 3,619.0 
Other segment expense items(1)
969.7 137.4 728.2 294.4 264.4 2,394.1 
Operating income (loss)$659.1 $144.9 $560.6 $124.7 $(264.4)$1,224.9 
Other Segment Information(2)
Depreciation and amortization expense$81.3 $5.1 $50.9 $21.2 $63.0 $221.5 
Nine Months Ended September 30, 2024
Net sales$6,492.3 $1,143.5 $6,303.7 $1,873.2 $— $15,812.7 
Cost of sales4,951.5 877.8 5,029.9 1,506.4 — 12,365.6 
Gross profit1,540.8 265.7 1,273.8 366.8 — 3,447.1 
Other segment expense items(1)
956.8 128.0 698.4 284.8 136.4 2,204.4 
Operating income (loss)$584.0 $137.7 $575.4 $82.0 $(136.4)$1,242.7 
Other Segment Information(2)
Depreciation and amortization expense$57.9 $2.7 $41.9 $21.1 $82.2 $205.8 
(1)Primarily includes payroll and other coworker costs, advertising expense and other selling and administrative costs.
(2)Depreciation and amortization expense is primarily included within Other segment expense items.
Geographic Areas and Revenue Mix
 Three Months Ended September 30, 2025
CorporateSmall BusinessPublicOtherTotal
Geography(1)
United States$2,243.0 $427.8 $2,346.8 $5.6 $5,023.2 
Rest of World12.4 6.0 3.0 692.8 714.2 
Total Net sales$2,255.4 $433.8 $2,349.8 $698.4 $5,737.4 
Major Product and Services
Hardware$1,521.8 $332.8 $1,714.2 $519.7 $4,088.5 
Software492.8 73.8 435.1 91.9 1,093.6 
Services224.9 22.4 195.1 83.2 525.6 
Other(2)
15.9 4.8 5.4 3.6 29.7 
Total Net sales$2,255.4 $433.8 $2,349.8 $698.4 $5,737.4 
Sales by Channel
Corporate$2,255.4 $— $— $— $2,255.4 
Small Business— 433.8 — — 433.8 
Government— — 744.7 — 744.7 
Education— — 911.2 — 911.2 
Healthcare— — 693.9 — 693.9 
Other— — — 698.4 698.4 
Total Net sales$2,255.4 $433.8 $2,349.8 $698.4 $5,737.4 
Timing of Revenue Recognition
Transferred at a point in time where CDW is principal$1,884.2 $373.6 $2,022.1 $587.6 $4,867.5 
Transferred at a point in time where CDW is agent198.9 44.6 170.9 37.9 452.3 
Transferred over time where CDW is principal172.3 15.6 156.8 72.9 417.6 
Total Net sales$2,255.4 $433.8 $2,349.8 $698.4 $5,737.4 
(1)Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address.
(2)Includes items such as delivery charges to customers.
Three Months Ended September 30, 2024
CorporateSmall BusinessPublicOtherTotal
Geography(1)
United States$2,149.4 $373.0 $2,333.8 $6.9 $4,863.1 
Rest of World11.8 6.7 1.9 633.1 653.5 
Total Net sales$2,161.2 $379.7 $2,335.7 $640.0 $5,516.6 
Major Product and Services
Hardware$1,468.6 $294.7 $1,742.8 $452.5 $3,958.6 
Software458.4 60.3 427.0 102.6 1,048.3 
Services218.9 20.4 161.0 81.6 481.9 
Other(2)
15.3 4.3 4.9 3.3 27.8 
Total Net sales$2,161.2 $379.7 $2,335.7 $640.0 $5,516.6 
Sales by Channel
Corporate$2,161.2 $— $— $— $2,161.2 
Small Business— 379.7 — — 379.7 
Government— — 691.0 — 691.0 
Education— — 995.7 — 995.7 
Healthcare— — 649.0 — 649.0 
Other— — — 640.0 640.0 
Total Net sales$2,161.2 $379.7 $2,335.7 $640.0 $5,516.6 
Timing of Revenue Recognition
Transferred at a point in time where CDW is principal$1,799.8 $328.1 $2,053.4 $539.7 $4,721.0 
Transferred at a point in time where CDW is agent197.5 37.0 160.0 33.6 428.1 
Transferred over time where CDW is principal163.9 14.6 122.3 66.7 367.5 
Total Net sales$2,161.2 $379.7 $2,335.7 $640.0 $5,516.6 
(1)Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address.
(2)Includes items such as delivery charges to customers.
Nine Months Ended September 30, 2025
CorporateSmall BusinessPublicOtherTotal
Geography(1)
United States$7,014.7 $1,250.3 $6,511.7 $16.7 $14,793.4 
Rest of World58.2 19.4 7.9 2,034.2 2,119.7 
Total Net sales$7,072.9 $1,269.7 $6,519.6 $2,050.9 $16,913.1 
Major Product and Services
Hardware$4,875.6 $994.4 $4,903.2 $1,501.6 $12,274.8 
Software1,460.7 195.8 1,079.5 296.1 3,032.1 
Services689.5 65.8 522.7 242.1 1,520.1 
Other(2)
47.1 13.7 14.2 11.1 86.1 
Total Net sales$7,072.9 $1,269.7 $6,519.6 $2,050.9 $16,913.1 
Sales by Channel
Corporate$7,072.9 $— $— $— $7,072.9 
Small Business— 1,269.7 — — 1,269.7 
Government— — 1,939.0 — 1,939.0 
Education— — 2,470.3 — 2,470.3 
Healthcare— — 2,110.3 — 2,110.3 
Other— — — 2,050.9 2,050.9 
Total Net sales$7,072.9 $1,269.7 $6,519.6 $2,050.9 $16,913.1 
Timing of Revenue Recognition
Transferred at a point in time where CDW is principal$5,928.4 $1,106.5 $5,689.3 $1,722.3 $14,446.5 
Transferred at a point in time where CDW is agent616.3 116.1 417.0 121.5 1,270.9 
Transferred over time where CDW is principal528.2 47.1 413.3 207.1 1,195.7 
Total Net sales$7,072.9 $1,269.7 $6,519.6 $2,050.9 $16,913.1 
(1)Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address.
(2)Includes items such as delivery charges to customers.
Nine Months Ended September 30, 2024
CorporateSmall BusinessPublicOtherTotal
Geography(1)
United States$6,448.0 $1,125.9 $6,298.6 $20.3 $13,892.8 
Rest of World44.3 17.6 5.1 1,852.9 1,919.9 
Total Net sales$6,492.3 $1,143.5 $6,303.7 $1,873.2 $15,812.7 
Major Product and Services
Hardware$4,466.4 $902.0 $4,855.4 $1,342.8 $11,566.6 
Software1,312.1 173.7 992.6 299.9 2,778.3 
Services668.1 54.7 441.6 221.7 1,386.1 
Other(2)
45.7 13.1 14.1 8.8 81.7 
Total Net sales$6,492.3 $1,143.5 $6,303.7 $1,873.2 $15,812.7 
Sales by Channel
Corporate$6,492.3 $— $— $— $6,492.3 
Small Business— 1,143.5 — — 1,143.5 
Government— — 1,873.4 — 1,873.4 
Education— — 2,609.9 — 2,609.9 
Healthcare— — 1,820.4 — 1,820.4 
Other— — — 1,873.2 1,873.2 
Total Net sales$6,492.3 $1,143.5 $6,303.7 $1,873.2 $15,812.7 
Timing of Revenue Recognition
Transferred at a point in time where CDW is principal$5,409.5 $997.0 $5,561.3 $1,593.8 $13,561.6 
Transferred at a point in time where CDW is agent585.5 110.3 402.7 95.6 1,194.1 
Transferred over time where CDW is principal497.3 36.2 339.7 183.8 1,057.0 
Total Net sales$6,492.3 $1,143.5 $6,303.7 $1,873.2 $15,812.7 
(1)Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address.
(2)Includes items such as delivery charges to customers.
The following tables present Net sales by major category for the three and nine months ended September 30, 2025 and 2024. Categories are based upon internal classifications.
Three Months Ended September 30,
2025
2024
Net SalesPercentage
of Total Net
Sales		Net SalesPercentage
of Total Net
Sales
Hardware:
Notebooks/Mobile Devices$1,433.2 25.0 %$1,370.4 24.8 %
Netcomm Products735.8 12.8 667.6 12.1 
Collaboration453.3 7.9 460.3 8.3 
Data Storage and Servers469.9 8.2 506.0 9.2 
Desktops343.2 6.0 291.4 5.3 
Other Hardware653.1 11.4 662.9 12.1 
Total Hardware4,088.5 71.3 3,958.6 71.8 
Software(1)
1,093.6 19.1 1,048.3 19.0 
Services(1)
525.6 9.2 481.9 8.7 
Other(2)
29.7 0.4 27.8 0.5 
Total Net sales$5,737.4 100.0 %$5,516.6 100.0 %
Nine Months Ended September 30,
2025
2024
Net SalesPercentage
of Total Net
Sales		Net SalesPercentage
of Total Net
Sales
Hardware:
Notebooks/Mobile Devices$4,358.0 25.8 %$3,949.9 25.0 %
Netcomm Products2,023.3 12.0 1,877.1 11.9 
Collaboration1,323.0 7.8 1,364.9 8.6 
Data Storage and Servers1,631.7 9.6 1,593.2 10.1 
Desktops1,053.3 6.2 845.3 5.3 
Other Hardware1,885.5 11.1 1,936.2 12.2 
Total Hardware12,274.8 72.5 11,566.6 73.1 
Software(1)
3,032.1 17.9 2,778.3 17.6 
Services(1)
1,520.1 9.0 1,386.1 8.8 
Other(2)
86.1 0.6 81.7 0.5 
Total Net sales$16,913.1 100.0 %$15,812.7 100.0 %
(1)Certain software and services revenues are recorded on a net basis as the Company is acting as an agent in the transaction. As a result, the category percentage of net revenues is not representative of the category percentage of gross profits.
(2)Includes items such as delivery charges to customers.