Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount, after accumulated amortization, of debt discount.

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Long-Term Debt - Debt Issued (Details) - USD ($)	Jan. 31, 2020	Apr. 30, 2019	May 31, 2017
Debt Instrument [Line Items]
Unsecured notes, issued	$ 3,000,000,000.0
2029 Fixed Rate Notes Issued in 2019
Debt Instrument [Line Items]
Unsecured notes, issued		$ 1,500,000,000
Unsecured notes, interest rate		3.65%
Unamortized discount		$ 9,000,000
2049 Fixed Rate Notes Issued in 2019
Debt Instrument [Line Items]
Unsecured notes, issued		$ 1,500,000,000
Unsecured notes, interest rate		4.55%
Unamortized discount		$ 19,000,000
2027 Fixed Rate Notes Issued in 2017
Debt Instrument [Line Items]
Unsecured notes, issued			$ 1,500,000,000
Unsecured notes, interest rate			3.10%
Unamortized discount			$ 9,000,000
2047 Fixed Rate Notes Issued in 2017
Debt Instrument [Line Items]
Unsecured notes, issued			$ 1,500,000,000
Unsecured notes, interest rate			4.05%
Unamortized discount			$ 23,000,000