Compensation Plans - Compensation Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	$ 526.4	$ 381.6	$ 251.0
Profit sharing plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	12.7	11.6	10.5
Restricted cash awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	450.6	324.6	196.6
Restricted stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	63.1	45.4	43.9
Restricted stock and RSUs | Deferred Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs	$ 0.7	$ 0.5	$ 0.5