Summary of Significant Accounting Policies - Effects of Adoption on Consolidated Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Revenue:
Total revenue	$ 23,757,293	$ 19,767,945	$ 16,771,128
Cost of revenue:
Gross profit	2,897,917	1,926,899	1,549,312
Selling, general and administrative expenses	(2,084,156)	(1,376,664)	(1,041,975)
Operating income	813,761	550,236	507,337
Interest expense and finance charges, net	(166,421)	(84,675)	(45,357)
Other income (expense), net	30,363	(8,984)	1,123
Income before income taxes	677,703	456,577	463,103
Provision for income taxes	(176,991)	(156,596)	(162,863)
Net income	$ 500,712	$ 299,981	$ 300,240
Earnings per common share:
Basic	$ 9.79	$ 7.21	$ 7.52
Diluted	$ 9.74	$ 7.17	$ 7.48
As Reported | Accounting Standards Update 2014-09
Revenue:
Total revenue		$ 20,053,764	$ 17,045,700
Cost of revenue:
Gross profit		1,927,699	1,550,940
Selling, general and administrative expenses		(1,376,664)	(1,041,975)
Operating income		551,036	508,965
Interest expense and finance charges, net		(84,675)	(45,357)
Other income (expense), net		(8,984)	1,123
Income before income taxes		457,377	464,731
Provision for income taxes		(156,779)	(163,558)
Net income		$ 300,598	$ 301,173
Earnings per common share:
Basic		$ 7.23	$ 7.54
Diluted		$ 7.19	$ 7.51
Adjustments for ASC Topic 606 | Accounting Standards Update 2014-09
Revenue:
Total revenue		$ (285,819)	$ (274,572)
Cost of revenue:
Gross profit		(800)	(1,628)
Selling, general and administrative expenses		0	0
Operating income		(800)	(1,628)
Interest expense and finance charges, net		0	0
Other income (expense), net		0	0
Income before income taxes		(800)	(1,628)
Provision for income taxes		183	695
Net income		$ (617)	$ (933)
Earnings per common share:
Basic		$ (0.02)	$ (0.02)
Diluted		$ (0.02)	$ (0.03)
Product
Revenue:
Total revenue	$ 19,069,966	$ 17,323,078	$ 14,796,299
Cost of revenue:
Cost of revenue	(17,912,711)	(16,326,576)	(13,989,150)
Product | As Reported | Accounting Standards Update 2014-09
Revenue:
Total revenue		17,608,897	15,070,871
Cost of revenue:
Cost of revenue		(16,611,595)	(14,262,094)
Product | Adjustments for ASC Topic 606 | Accounting Standards Update 2014-09
Revenue:
Total revenue		(285,819)	(274,572)
Cost of revenue:
Cost of revenue		285,019	272,944
Service
Revenue:
Total revenue	4,687,327	2,444,867	1,974,829
Cost of revenue:
Cost of revenue	$ (2,946,664)	(1,514,470)	(1,232,666)
Service | As Reported | Accounting Standards Update 2014-09
Revenue:
Total revenue		2,444,867	1,974,829
Cost of revenue:
Cost of revenue		(1,514,470)	(1,232,666)
Service | Adjustments for ASC Topic 606 | Accounting Standards Update 2014-09
Revenue:
Total revenue		0	0
Cost of revenue:
Cost of revenue		$ 0	$ 0