Accumulated Other Comprehensive Income (Loss) (Summary Of Accumulated Other Comprehensive Income, Net Of Taxes) (Details) - USD ($) $ in Thousands	Feb. 29, 2020	Nov. 30, 2019	Feb. 28, 2019	Nov. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	$ 9,385,905	$ 9,601,684	$ 9,956,133	$ 10,079,257
Net unrealized gains on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	378	141
Net unrealized foreign exchange losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	(201,942)	(192,709)
Net unrealized gains (losses) on instrument specific credit risk
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	4,107	(18,889)
Net minimum pension liability
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	(60,943)	(61,582)
AOCI including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Equity	$ (258,400)	$ (273,039)