Leases - Lease Terms (Details) $ in Millions	3 Months Ended	9 Months Ended
	Aug. 31, 2020 USD ($)	Aug. 31, 2020 USD ($)
Leases [Abstract]
Operating lease expense	$ 51	$ 153
Variable lease expense	$ (36)	$ (26)
Weighted average remaining lease term - operating leases (in years)	13 years	13 years
Weighted average discount rate - operating leases (percent)	3.20%	3.20%