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Segment Information - Summary of Revenue Disaggregated by Reportable Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Disaggregation of revenue	$ 2,743,377	$ 2,229,501	$ 5,394,227	$ 4,422,569
Hardware
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,731,116	1,350,944	3,404,704	2,665,969
Software
Segment Reporting Information [Line Items]
Disaggregation of revenue	618,126	538,234	1,254,825	1,116,229
Services
Segment Reporting Information [Line Items]
Disaggregation of revenue	394,135	340,323	734,698	640,371
Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	2,575,004	2,086,546	5,099,805	4,160,027
Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	168,373	142,955	294,422	262,542
North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	2,247,444	1,759,629	4,311,949	3,414,410
North America | Hardware
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,559,474	1,168,770	3,010,793	2,278,259
North America | Software
Segment Reporting Information [Line Items]
Disaggregation of revenue	377,007	331,809	718,554	640,547
North America | Services
Segment Reporting Information [Line Items]
Disaggregation of revenue	310,963	259,050	582,602	495,604
North America | Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	2,126,656	1,661,386	4,097,577	3,231,027
North America | Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	120,788	98,243	214,372	183,383
EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	426,331	417,374	957,764	896,210
EMEA | Hardware
Segment Reporting Information [Line Items]
Disaggregation of revenue	155,384	170,406	366,007	366,377
EMEA | Software
Segment Reporting Information [Line Items]
Disaggregation of revenue	212,997	184,986	485,399	419,409
EMEA | Services
Segment Reporting Information [Line Items]
Disaggregation of revenue	57,950	61,982	106,358	110,424
EMEA | Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	389,421	380,325	896,283	831,302
EMEA | Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	36,910	37,049	61,481	64,908
APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	69,602	52,498	124,514	111,949
APAC | Hardware
Segment Reporting Information [Line Items]
Disaggregation of revenue	16,258	11,768	27,904	21,333
APAC | Software
Segment Reporting Information [Line Items]
Disaggregation of revenue	28,122	21,439	50,872	56,273
APAC | Services
Segment Reporting Information [Line Items]
Disaggregation of revenue	25,222	19,291	45,738	34,343
APAC | Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	58,927	44,835	105,945	97,698
APAC | Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	10,675	7,663	18,569	14,251
Large Enterprise / Corporate
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,935,807	1,543,293	3,749,869	3,042,872
Large Enterprise / Corporate | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,597,988	1,219,953	3,036,717	2,391,381
Large Enterprise / Corporate | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	306,389	297,677	660,293	606,752
Large Enterprise / Corporate | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	31,430	25,663	52,859	44,739
Commercial
Segment Reporting Information [Line Items]
Disaggregation of revenue	485,738	396,020	959,977	773,265
Commercial | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	448,974	362,744	890,133	706,789
Commercial | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	19,312	17,166	37,733	37,699
Commercial | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	17,452	16,110	32,111	28,777
Public Sector
Segment Reporting Information [Line Items]
Disaggregation of revenue	321,832	290,188	684,381	606,432
Public Sector | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	200,482	176,932	385,099	316,240
Public Sector | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	100,630	102,531	259,738	251,759
Public Sector | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	$ 20,720	$ 10,725	$ 39,544	$ 38,433

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