Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 6.I.7)
-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817

Name:	us-gaap_DeferredFederalIncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Income Taxes - Schedule of Reconciliation of Total Income Tax Expense and Amount Computed by Statutory Federal Income Tax Rate to Income Before Taxes (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Feb. 28, 2018	May 31, 2019	May 31, 2018	May 31, 2017
Income Taxes [Line Items]
Provisional benefit related to remeasurement of net U.S. deferred tax liability	$ (1,150)		$ (1,150)
Foreign deferred tax benefits		$ (17)	(579)	$ (108)
U.S. deferred tax expenses		$ (61)	271	989
Corporate Structuring Transactions [Member]
Income Taxes [Line Items]
Foreign deferred tax benefits			434	94
U.S. deferred tax expenses			179	$ 26
U.S. Plans [Member]
Income Taxes [Line Items]
Additional provisional amount recognized one time benefit	$ 204		$ 204