Earnings Per Share - Basic and Diluted Earnings Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	May 31, 2020	May 31, 2019	May 31, 2020	May 31, 2019
Earnings Per Share [Abstract]
Net income (loss) for basic and diluted earnings per share	$ (4,374)	$ 451	$ (5,155)	$ 787
Weighted-average shares outstanding (in shares)	721	691	702	692
Dilutive effect of equity plans (in shares)	0	2	0	2
Diluted weighted-average shares outstanding (in shares)	721	693	702	694
Basic earnings per share (in dollars per share)	$ (6.07)	$ 0.65	$ (7.34)	$ 1.14
Diluted earnings per share (in dollars per share)	$ (6.07)	$ 0.65	$ (7.34)	$ 1.13