Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Beginning balance	$ 3,134,316	$ 2,748,184	$ 3,019,475	$ 2,665,769
Net income	210,670	143,364	344,927	240,415
Dividends on common stock	(13,012)	(13,733)	(27,142)	(27,797)
Employee stock options/other		968		3,506
Stock awards	0	0	0	0
Stock-based compensation	9,021	8,082	15,888	13,654
Tax payments associated with stock-based compensation awards	(50,000)		(50,000)
Tax payments associated with stock-based compensation awards			12,153	8,456
Ending balance	$ 3,290,995	$ 2,886,865	$ 3,290,995	2,886,865
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)	5,384	1,305	(5,785)	(1,107)
Beginning balance	$ (202,287)	$ (35,977)	$ (217,383)	$ (27,761)
Employee stock options/other (in shares)		0		0
Employee stock options/other		$ 0		$ 0
Stock awards (in shares)	64	2	785	12
Stock awards	$ 2,376	$ 44	$ 29,625	$ 284
Tax payments associated with stock-based compensation awards	$ (50,000)		$ (50,000)
Common stock repurchased (in shares)	(1,520)		(1,520)
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)	6,840	1,303	6,840	1,303
Ending balance	$ (249,911)	$ (35,933)	$ (249,911)	$ (35,933)
Paid-in Capital
Beginning balance	828,238	827,456	848,620	824,306
Employee stock options/other		903		3,268
Stock awards	(2,376)	(88)	(29,625)	(4,875)
Stock-based compensation	9,021	8,082	15,888	13,654
Ending balance	$ 834,883	$ 836,353	$ 834,883	$ 836,353
Common Stock
Beginning balance (in shares)	(100,711)	(100,042)	(100,711)	(99,869)
Beginning balance	$ 100,711	$ 100,042	$ 100,711	$ 99,869
Employee stock options/other (in shares)		(65)		(238)
Employee stock options/other		$ 65		$ 238
Stock awards (in shares)	0	44	0	44
Stock awards	$ 0	$ 44	$ 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	2,499,491	1,951,657	2,379,364	1,868,896
Net income	210,670	143,364	344,927	240,415
Dividends on common stock	(13,012)	(13,733)	(27,142)	(27,797)
Ending balance	$ 2,697,149	$ 2,081,288	$ 2,697,149	2,081,288
Retained Earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance				$ (226)