Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Beginning balance	$ 3,290,995	$ 2,886,865	$ 3,019,475	$ 2,665,769
Net income	255,329	150,097	600,256	390,512
Dividends on common stock	(12,772)	(13,168)	(39,914)	(40,965)
Employee stock options/other				3,506
Stock awards		0	0	0
Stock-based compensation	7,056	6,114	22,944	19,768
Tax payments associated with stock-based compensation awards	(50,000)	(188,175)	(100,000)	(188,175)
Tax payments associated with stock-based compensation awards			12,153	8,456
Ending balance	$ 3,490,608	$ 2,841,733	$ 3,490,608	2,841,733
Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance				$ (226)
Grantor Stock Ownership Trust
Beginning balance (in shares)	6,705	6,705	6,705	7,124
Beginning balance	$ (72,718)	$ (72,718)	$ (72,718)	$ (77,265)
Stock awards (in shares)		0	0	419
Stock awards		$ 0	$ 0	$ 4,547
Ending balance (in shares)	6,705	6,705	6,705	6,705
Ending balance	$ (72,718)	$ (72,718)	$ (72,718)	$ (72,718)
Accumulated Other Comprehensive Income
Beginning balance	(19,119)	(22,276)	(19,119)	(22,276)
Ending balance	$ (19,119)	$ (22,276)	$ (19,119)	$ (22,276)
Treasury Stock
Beginning balance (in shares)	6,840	1,303	(5,785)	(1,107)
Beginning balance	$ (249,911)	$ (35,933)	$ (217,383)	$ (27,761)
Employee stock options/other (in shares)				0
Employee stock options/other				$ 0
Stock awards (in shares)		3	785	15
Stock awards		$ 87	$ 29,625	$ 371
Tax payments associated with stock-based compensation awards	$ (50,000)	$ (188,175)	$ (100,000)	$ (188,175)
Common stock repurchased (in shares)	(1,582)	(4,669)	(3,102)	(4,669)
Tax payments associated with stock-based compensation awards ( in shares)			(320)	(208)
Tax payments associated with stock-based compensation awards			$ 12,153	$ 8,456
Ending balance (in shares)	8,422	5,969	8,422	5,969
Ending balance	$ (299,911)	$ (224,021)	$ (299,911)	$ (224,021)
Paid-in Capital
Beginning balance	834,883	836,353	848,620	824,306
Employee stock options/other				3,268
Stock awards		(87)	(29,625)	(4,962)
Stock-based compensation	7,056	6,114	22,944	19,768
Ending balance	$ 841,939	$ 842,380	$ 841,939	$ 842,380
Common Stock
Beginning balance (in shares)	(100,711)	(100,151)	(100,711)	(99,869)
Beginning balance	$ 100,711	$ 100,151	$ 100,711	$ 99,869
Employee stock options/other (in shares)				(238)
Employee stock options/other				$ 238
Stock awards (in shares)		0	0	44
Stock awards		$ 0	$ 0	$ 44
Ending balance (in shares)	(100,711)	(100,151)	(100,711)	(100,151)
Ending balance	$ 100,711	$ 100,151	$ 100,711	$ 100,151
Retained Earnings [Member]
Beginning balance	2,697,149	2,081,288	2,379,364	1,868,896
Net income	255,329	150,097	600,256	390,512
Dividends on common stock	(12,772)	(13,168)	(39,914)	(40,965)
Ending balance	$ 2,939,706	$ 2,218,217	$ 2,939,706	2,218,217
Retained Earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance				$ (226)