Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Beginning balance	$ 2,665,769	$ 2,383,122
Net income	97,051	59,748
Dividends on common stock	$ (14,064)	(8,233)
Employee stock options/other (in shares)	(163,651)
Employee stock options/other	$ 2,538	8,226
Stock awards	0	0
Stock-based compensation	5,572	4,950
Tax payments associated with stock-based compensation awards	8,456	6,219
Ending balance	$ 2,748,184	$ 2,443,104
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member	Accounting Standards Update 2016-02 [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	$ (226)	$ 1,510
Grantor Stock Ownership Trust
Beginning balance (in shares)	(7,124,000)	(7,631,000)
Beginning balance	$ (77,265)	$ (82,758)
Stock awards (in shares)	(419,000)	(314,000)
Stock awards	$ 4,547	$ 3,399
Ending balance (in shares)	(6,705,000)	(7,317,000)
Ending balance	$ (72,718)	$ (79,359)
Accumulated Other Comprehensive Income
Beginning balance	(22,276)	(15,506)
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect		(1,643)
Ending balance	$ (22,276)	$ (17,149)
Treasury Stock
Beginning balance (in shares)	(1,107,000)	(24,356,000)
Beginning balance	$ (27,761)	$ (591,344)
Employee stock options/other (in shares)	0
Employee stock options/other	$ 0
Stock awards (in shares)	(10,000)	15,000
Stock awards	$ 240	$ (387)
Tax payments associated with stock-based compensation awards ( in shares)	(208,000)	(155,000)
Tax payments associated with stock-based compensation awards	$ 8,456	$ 6,219
Ending balance (in shares)	(1,305,000)	(24,526,000)
Ending balance	$ (35,977)	$ (597,950)
Paid-in Capital
Beginning balance	824,306	793,954
Employee stock options/other	2,365	7,528
Stock awards	(4,787)	(3,012)
Stock-based compensation	5,572	4,950
Ending balance	$ 827,456	$ 803,420
Common Stock
Beginning balance (in shares)	(99,869,000)	(121,593,000)
Beginning balance	$ 99,869	$ 121,593
Employee stock options/other (in shares)	(173,000)	(698,000)
Employee stock options/other	$ 173	$ 698
Ending balance (in shares)	(100,042,000)	(122,291,000)
Ending balance	$ 100,042	$ 122,291
Retained Earnings [Member]
Beginning balance	1,868,896	2,157,183
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect		1,643
Net income	97,051	59,748
Dividends on common stock	(14,064)	(8,233)
Ending balance	1,951,657	2,211,851
Retained Earnings [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance	$ (226)	$ 1,510