Compensation Plans - Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Feb. 28, 2025	Feb. 29, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	$ 158.1	$ 135.0
Profit sharing plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	7.4	6.9
Restricted cash awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	115.1	107.9
Restricted stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	$ 35.6	$ 20.2