Earnings Per Share - Basic and Diluted Earnings Per Share Computation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Earnings Per Share [Abstract]
Net income (loss) for basic and diluted earnings per share	$ (781)	$ 336
Weighted-average shares outstanding (in shares)	684	693
Dilutive effect of equity plans (in shares)	0	2
Diluted weighted-average shares outstanding (in shares)	684	695
Basic earnings per share (in dollars per share)	$ (1.14)	$ 0.48
Diluted earnings per share (in dollars per share)	$ (1.14)	$ 0.48
Antidilutive equity awards excluded from diluted earnings per share computations (in shares)	1	0