Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in Goodwill by reportable segment are as follows:

	Corporate		Small Business		Public		Other(1)		Consolidated
Balances as of December 31, 2022(2)	$	2,133.4	$	230.2	$	1,658.8	$	320.3	$	4,342.7
Acquisition activity(3)	19.7		—		36.3		—		56.0
Foreign currency translation	—		—		—		14.7		14.7
Balances as of December 31, 2023(2)	2,153.1		230.2		1,695.1		335.0		4,413.4
Acquisition activity(4)	217.7		—		0.4		—		218.1
Foreign currency translation	—		—		—		(11.1)		(11.1)
Balances as of December 31, 2024(2)	$	2,370.8	$	230.2	$	1,695.5	$	323.9	$	4,620.4

(1)Other is comprised of CDW UK and CDW Canada operating segments.

(2)Goodwill is net of accumulated impairment losses of $1,571 million, $354 million and $28 million related to the Corporate, Public and Other segments, respectively, recorded in 2008 and 2009.

(3)Includes other immaterial acquisitions.

(4)The acquisition of Mission is fully allocated to the Corporate segment. For additional information regarding the acquisition of Mission, see Note 3 (Acquisitions). Remaining activity in the Public segments includes other immaterial acquisitions.

Schedule of Finite-Lived Intangible Assets

A summary of intangible assets is as follows:

December 31, 2024	Useful Lives (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	3 - 14	$	3,478.1	$	(2,361.6)	$	1,116.5
Trade name	1 - 20	449.6		(387.6)		62.0
Internally developed software	3 - 5	391.6		(246.9)		144.7
Other	1 - 10	35.6		(2.2)		33.4
Total		$	4,354.9	$	(2,998.3)	$	1,356.6
December 31, 2023	Useful Lives (Years)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Customer relationships	3 - 14	$	3,379.7	$	(2,236.6)	$	1,143.1
Trade name	1 - 20	446.1		(366.6)		79.5
Internally developed software	3 - 5	474.9		(330.6)		144.3
Other	1 - 10	4.3		(1.5)		2.8
Total		$	4,305.0	$	(2,935.3)	$	1,369.7

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Estimated future amortization expense related to intangible assets is as follows:

Years ending December 31,	Estimated Future Amortization Expense
2025	$	240.0
2026	217.8
2027	182.4
2028	138.0
2029	125.0
Thereafter	453.4
Total future amortization expense	$	1,356.6