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Basis of Presentation and Significant Accounting Policies (Narratives) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Dec. 01, 2019	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019	Nov. 30, 2019
Severance Costs		$ 6,700
Cash equivalents		404,500		$ 404,500		$ 302,500
Other comprehensive income (loss)		52,000	$ 47,500	111,700	$ 77,500
Retained earnings		2,255,742		2,255,742		2,157,183
Financial Service [Member]
Contract assets		$ 21,500		$ 21,500		$ 20,600
Accounting Standards Update 2016-02 [Member]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,500
Accounting Standards Update 2018-02 [Member]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,600