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Segment Information - Summary of Revenue Disaggregated by Reportable Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Disaggregation of revenue	$ 2,534,354	$ 2,447,521	$ 7,928,581	$ 6,870,090
Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	2,395,737	2,324,889	7,495,542	6,484,916
Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	138,617	122,632	433,039	385,174
North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	2,099,837	2,019,876	6,411,786	5,434,286
North America | Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,990,277	1,926,059	6,087,854	5,157,086
North America | Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	109,560	93,817	323,932	277,200
EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	379,574	381,448	1,337,338	1,277,658
EMEA | Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	358,697	358,981	1,254,980	1,190,283
EMEA | Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	20,877	22,467	82,358	87,375
APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	54,943	46,197	179,457	158,146
APAC | Gross revenue recognition (Principal)
Segment Reporting Information [Line Items]
Disaggregation of revenue	46,763	39,849	152,708	137,547
APAC | Net revenue recognition (Agent)
Segment Reporting Information [Line Items]
Disaggregation of revenue	8,180	6,348	26,749	20,599
Large Enterprise / Corporate
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,793,654	1,745,485	5,543,523	4,788,357
Large Enterprise / Corporate | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,473,014	1,447,246	4,509,731	3,838,627
Large Enterprise / Corporate | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	295,565	276,292	955,858	883,044
Large Enterprise / Corporate | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	25,075	21,947	77,934	66,686
Commercial
Segment Reporting Information [Line Items]
Disaggregation of revenue	454,546	414,944	1,414,523	1,188,209
Commercial | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	424,600	384,458	1,314,733	1,091,247
Commercial | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	11,898	13,209	49,631	50,908
Commercial | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	18,048	17,277	50,159	46,054
Public Sector
Segment Reporting Information [Line Items]
Disaggregation of revenue	286,154	287,092	970,535	893,524
Public Sector | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	202,223	188,172	587,322	504,412
Public Sector | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	72,111	91,947	331,849	343,706
Public Sector | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	11,820	6,973	51,364	45,406
Hardware
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,572,275	1,592,495	4,976,979	4,258,464
Hardware | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	1,404,207	1,418,335	4,415,000	3,696,594
Hardware | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	151,505	160,645	517,512	527,022
Hardware | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	16,563	13,515	44,467	34,848
Software
Segment Reporting Information [Line Items]
Disaggregation of revenue	596,922	531,744	1,851,747	1,647,973
Software | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	396,921	338,440	1,115,475	978,987
Software | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	184,361	178,868	669,760	598,277
Software | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	15,640	14,436	66,512	70,709
Services
Segment Reporting Information [Line Items]
Disaggregation of revenue	365,157	323,282	1,099,855	963,653
Services | North America
Segment Reporting Information [Line Items]
Disaggregation of revenue	298,709	263,101	881,311	758,705
Services | EMEA
Segment Reporting Information [Line Items]
Disaggregation of revenue	43,708	41,935	150,066	152,359
Services | APAC
Segment Reporting Information [Line Items]
Disaggregation of revenue	$ 22,740	$ 18,246	$ 68,478	$ 52,589

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