Compensation Plans - Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2021	Feb. 29, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 96.7	$ 87.9
Profit sharing plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	4.0	4.1
Restricted cash awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	49.1	77.3
Stock options and stock appreciation rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	39.4	0.0
Restricted stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 4.2	$ 6.5