Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Changes in accounting principles	[1]	Common stock	Ordinary shares	Additional paid-in capital	Retained earnings	Retained earnings Changes in accounting principles	[1]	AOCI	Treasury stock
Beginning balance at Nov. 30, 2018	$ 24,443	$ (24)		$ 7	$ 358	$ 8,756	$ 25,066	$ (24)		$ (1,949)	$ (7,795)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,567						2,567
Other comprehensive income (loss)	(234)									(234)
Cash dividends declared	(1,034)						(1,034)
Purchases of treasury stock under the Repurchase Program and other	(424)					42					(467)
Ending balance at Aug. 31, 2019	25,295			7	358	8,798	26,576			(2,183)	(8,261)
Beginning balance at May. 31, 2019	24,108			7	358	8,785	25,138			(2,076)	(8,104)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,780						1,780
Other comprehensive income (loss)	(107)									(107)
Cash dividends declared	(342)						(342)
Purchases of treasury stock under the Repurchase Program and other	(144)					13					(157)
Ending balance at Aug. 31, 2019	25,295			7	358	8,798	26,576			(2,183)	(8,261)
Beginning balance at Nov. 30, 2019	25,365			7	358	8,807	26,653			(2,066)	(8,394)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(8,014)						(8,014)
Other comprehensive income (loss)	627									627
Cash dividends declared	(342)						(342)
Issuance of common stock	778			1		777
Issuance and repurchase of Convertible Notes	1,052			1		1,051
Purchases of treasury stock under the Repurchase Program and other	36				2	44					(10)
Ending balance at Aug. 31, 2020	19,503			8	361	10,680	18,297			(1,439)	(8,404)
Beginning balance at May. 31, 2020	20,840			7	360	9,683	21,155			(1,962)	(8,404)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2,858)						(2,858)
Other comprehensive income (loss)	524									524
Issuance of common stock	222					222
Repurchase of Convertible Notes	766			1		765
Other	9					9
Ending balance at Aug. 31, 2020	$ 19,503			$ 8	$ 361	$ 10,680	$ 18,297			$ (1,439)	$ (8,404)

[1] We adopted the provisions of Revenue from Contracts with Customers and Derivatives and Hedging on December 1, 2018.