Supplemental Cash Flow Information (Details) - USD ($) shares in Millions, $ in Millions	9 Months Ended
Aug. 31, 2020	Nov. 30, 2019	Aug. 31, 2019	Nov. 30, 2018
Conversion of Stock [Line Items]
Cash and cash equivalents (Consolidated Balance Sheets)	$ 8,176	$ 518
Restricted cash included in prepaid expenses and other and other assets	15	13
Total cash, cash equivalents and restricted cash (Consolidated Statements of Cash Flows)	$ 8,191	$ 530	$ 1,170	$ 996
Convertible \| Common Stock
Conversion of Stock [Line Items]
Shares issued (in shares)	83.3
Repurchase amount	$ 744

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3521-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3044-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=121583591&loc=SL98516268-108586

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