Summary of Significant Accounting Policies - Effects of Adoption on Consolidated Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Cash flows from operating activities:
Net income	$ 500,712	$ 299,981	$ 300,240
Adjustments to reconcile net income to cash provided by operating activities:
Deferred income taxes	(18,189)	(47,072)	(25,916)
Changes in operating assets and liabilities, net of acquisition of businesses:
Accounts receivables, net	(326,681)	(451,188)	(376,371)
Receivables from vendors, net	(26,389)	(63,831)	(83,477)
Inventories	(153,134)	(366,392)	(261,423)
Other operating assets and liabilities	46,465	95,466	100,454
Net cash provided by operating activities	$ 549,919	100,706	176,764
As Reported | Accounting Standards Update 2014-09
Cash flows from operating activities:
Net income		300,598	301,173
Adjustments to reconcile net income to cash provided by operating activities:
Deferred income taxes		(46,888)	(25,221)
Changes in operating assets and liabilities, net of acquisition of businesses:
Accounts receivables, net		(512,984)	(478,273)
Receivables from vendors, net		0	0
Inventories		(367,899)	(243,332)
Other operating assets and liabilities		94,138	99,160
Net cash provided by operating activities		100,706	176,764
Adjustments for ASC Topic 606 | Accounting Standards Update 2014-09
Cash flows from operating activities:
Net income		(617)	(933)
Adjustments to reconcile net income to cash provided by operating activities:
Deferred income taxes		(184)	(695)
Changes in operating assets and liabilities, net of acquisition of businesses:
Accounts receivables, net		61,796	101,902
Receivables from vendors, net		(63,831)	(83,477)
Inventories		1,507	(18,091)
Other operating assets and liabilities		1,329	1,294
Net cash provided by operating activities		$ 0	$ 0