Fair Value Measurements (Tables)

12 Months Ended

Apr. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The following table summarizes the assets and liabilities measured or disclosed at fair value on a recurring basis:

	2020				2021
April 30,	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	$	675	$	675	$	1,150	$	1,150
Currency derivatives	78		78		3		3
Liabilities:
Currency derivatives	2		2		31		31
Short-term borrowings	333		333		205		205
Long-term debt	2,269		2,486		2,354		2,663