Leases - Lease Terms (Details) $ in Millions	3 Months Ended	6 Months Ended
	May 31, 2020 USD ($)	May 31, 2020 USD ($)
Leases [Abstract]
Operating lease expense	$ 55	$ 103
Variable lease expense	$ (21)	$ 10
Weighted average remaining lease term - operating leases (in years)	13 years	13 years
Weighted average discount rate - operating leases (percent)	3.20%	3.20%