Earnings Per Share - Basic and Diluted Earnings Per Share Computation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Earnings Per Share [Abstract]
Net income for basic and diluted earnings per share	$ 336	$ 391
Weighted-average shares outstanding (in shares)	693	717
Dilutive effect of equity plans (in shares)	2	2
Diluted weighted-average shares outstanding (in shares)	695	719
Basic earnings per share (in dollars per share)	$ 0.48	$ 0.54
Diluted earnings per share (in dollars per share)	$ 0.48	$ 0.54