Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Information about the Company’s segments is as follows:

	Corporate		Small Business		Public		Other		Headquarters		Total
Three Months Ended March 31, 2022
Net sales	$	2,627.6	$	524.0	$	2,033.0	$	764.5	$	—	$	5,949.1
Operating income (loss)	210.0		46.7		141.8		36.7		(48.3)		386.9
Depreciation and amortization expense	(25.0)		(1.4)		(16.3)		(8.4)		(20.3)		(71.4)
Three Months Ended March 31, 2021
Net sales	$	1,805.6	$	432.7	$	1,921.7	$	677.5	$	—	$	4,837.5
Operating income (loss)	161.4		42.8		136.7		27.7		(45.2)		323.4
Depreciation and amortization expense	(4.0)		(0.8)		(13.4)		(8.6)		(18.4)		(45.2)

Disaggregation of Revenue

Geographic Areas and Revenue Mix

	Three Months Ended March 31, 2022
	Corporate		Small Business		Public		Other		Total
Geography(1)
United States	$	2,616.8	$	524.0	$	2,033.0	$	4.6	$	5,178.4
Rest of World	10.8		—		—		759.9		770.7
Total Net sales	2,627.6		524.0		2,033.0		764.5		5,949.1
Major Product and Services
Hardware	1,983.6		443.5		1,646.3		608.7		4,682.1
Software	399.8		59.8		253.2		85.6		798.4
Services	225.3		15.1		129.2		67.9		437.5
Other(2)	18.9		5.6		4.3		2.3		31.1
Total Net sales	2,627.6		524.0		2,033.0		764.5		5,949.1
Sales by Channel
Corporate	2,627.6		—		—		—		2,627.6
Small Business	—		524.0		—		—		524.0
Government	—		—		543.9		—		543.9
Education	—		—		902.8		—		902.8
Healthcare	—		—		586.3		—		586.3
Other	—		—		—		764.5		764.5
Total Net sales	2,627.6		524.0		2,033.0		764.5		5,949.1
Timing of Revenue Recognition
Transferred at a point in time where CDW is principal	2,291.2		480.0		1,840.3		677.1		5,288.6
Transferred at a point in time where CDW is agent	180.6		34.3		96.3		29.5		340.7
Transferred over time where CDW is principal	155.8		9.7		96.4		57.9		319.8
Total Net sales	$	2,627.6	$	524.0	$	2,033.0	$	764.5	$	5,949.1
(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.

	Three Months Ended March 31, 2021
	Corporate		Small Business		Public		Other		Total
Geography(1)
United States	$	1,803.5	$	432.7	$	1,921.7	$	4.6	$	4,162.5
Rest of World	2.1		—		—		672.9		675.0
Total Net sales	1,805.6		432.7		1,921.7		677.5		4,837.5
Major Product and Services
Hardware	1,420.6		368.1		1,664.9		511.6		3,965.2
Software	267.3		49.2		194.4		99.1		610.0
Services	102.5		10.1		57.9		63.2		233.7
Other(2)	15.2		5.3		4.5		3.6		28.6
Total Net sales	1,805.6		432.7		1,921.7		677.5		4,837.5
Sales by Channel
Corporate	1,805.6		—		—		—		1,805.6
Small Business	—		432.7		—		—		432.7
Government	—		—		516.1		—		516.1
Education	—		—		943.3		—		943.3
Healthcare	—		—		462.3		—		462.3
Other	—		—		—		677.5		677.5
Total Net sales	1,805.6		432.7		1,921.7		677.5		4,837.5
Timing of Revenue Recognition
Transferred at a point in time where CDW is principal	1,627.7		402.0		1,825.9		600.6		4,456.2
Transferred at a point in time where CDW is agent	112.3		26.9		58.1		23.4		220.7
Transferred over time where CDW is principal	65.6		3.8		37.7		53.5		160.6
Total Net sales	$	1,805.6	$	432.7	$	1,921.7	$	677.5	$	4,837.5
(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 table presents Net sales by major category for the three months ended March 31, 2022 and 2021. Categories are based upon internal classifications.

	Three Months Ended March 31,
	2022				2021
	Net Sales		Percentage of Total Net Sales		Net Sales		Percentage of Total Net Sales
Notebooks/Mobile Devices	$	1,713.8	28.8	%	$	1,591.8	32.9	%
Netcomm Products	486.4		8.2		454.7		9.4
Desktops	337.5		5.7		265.3		5.5
Video	485.9		8.2		326.2		6.7
Enterprise and Data Storage (Including Drives)	353.7		5.9		259.9		5.4
Other Hardware	1,304.8		21.9		1,067.3		22.1
Total Hardware	4,682.1		78.7		3,965.2		82.0
Software(1)	798.4		13.4		610.0		12.6
Services(1)	437.5		7.4		233.7		4.8
Other(2)	31.1		0.5		28.6		0.6
Total Net sales	$	5,949.1	100.0	%	$	4,837.5	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.