Debt and Credit Facilities Short-term borrowings (Details) - USD ($) $ in Millions	12 Months Ended
Apr. 30, 2023	Apr. 30, 2022
Short-Term Debt [Abstract]
Short-term borrowings	$ 235	$ 0
Commercial Paper	$ 235	$ 0
Commercial Paper, Weighted Average Interest Rate, at Point in Time	5.17%	0.00%
Commercial Paper Borrowings, Average Remaining Maturity	21 days	0 days

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
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Name:	us-gaap_ShortTermBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant