Segment Information - Geographic Area Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 31	$ 6,533	$ 5,561	$ 16,043
North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	14	3,751	3,065	8,910
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5	1,738	1,622	4,486
Australia and Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1	937	681	2,261
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 10	$ 107	$ 192	$ 385