Compensation Plans - Compensation Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 86.0	$ 74.4	$ 173.9	$ 151.0
Profit sharing plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	1.3	1.3	5.4	5.2
Restricted cash awards (1)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	78.7	66.6	156.0	132.8
Restricted stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost	$ 6.0	$ 6.5	$ 12.5	$ 13.0