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)	787						787
Other comprehensive income (loss)	(127)									(127)
Cash dividends declared	(691)						(691)
Purchases of treasury stock under the Repurchase Program and other	(280)					29					(310)
Ending balance at May. 31, 2019	24,108			7	358	8,785	25,138			(2,076)	(8,104)
Beginning balance at Feb. 28, 2019	24,241			7	358	8,776	25,033			(1,869)	(8,063)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	451						451
Other comprehensive income (loss)	(207)									(207)
Cash dividends declared	(346)						(346)
Purchases of treasury stock under the Repurchase Program and other	(32)					9					(41)
Ending balance at May. 31, 2019	24,108			7	358	8,785	25,138			(2,076)	(8,104)
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)	(5,155)						(5,155)
Other comprehensive income (loss)	103									103
Cash dividends declared	(342)						(342)
Issuance of common stock through underwritten public offering (net of offering expenses and underwriters’ discount)	556			1		555
Equity component of Convertible Senior Notes	286					286
Purchases of treasury stock under the Repurchase Program and other	27				2	35					(10)
Ending balance at May. 31, 2020	20,840			7	360	9,683	21,155			(1,962)	(8,404)
Beginning balance at Feb. 29, 2020	24,290			7	358	8,829	25,527			(2,028)	(8,404)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(4,374)						(4,374)
Other comprehensive income (loss)	65									65
Issuance of common stock through underwritten public offering (net of offering expenses and underwriters’ discount)	556			1		555
Equity component of Convertible Senior Notes	286					286
Purchases of treasury stock under the Repurchase Program and other	16				2	12	2
Ending balance at May. 31, 2020	$ 20,840			$ 7	$ 360	$ 9,683	$ 21,155			$ (1,962)	$ (8,404)

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