Contingencies and Commitments - Narrative (Details) $ in Millions	9 Months Ended	12 Months Ended
	Aug. 31, 2021 USD ($)	Nov. 30, 2020 USD ($)	Sep. 22, 2021 classAction lawsuit	May 02, 2019 lawsuit
Loss Contingencies [Line Items]
Number of lawsuits				2
Reserve funds | $	$ 1,400	$ 400
Escrow deposit | $	167	166
Subsequent Event
Loss Contingencies [Line Items]
Number of lawsuits, COVID-19			72
Number of lawsuits dismissed or settled, COVID-19			38
Number of class actions, COVID-19 | classAction			10
Number of class actions dismissed or settled, COVID-19			5
Prepaid expenses and other
Loss Contingencies [Line Items]
Escrow deposit | $	$ 137	$ 136