Fair Value Measurements (Tables)

12 Months Ended

Apr. 30, 2020

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:

	2019				2020
April 30,	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Assets:
Cash and cash equivalents	$	307	$	307	$	675	$	675
Currency derivatives	40		40		78		78
Liabilities:
Currency derivatives	6		6		2		2
Short-term borrowings	150		150		333		333
Long-term debt	2,290		2,399		2,269		2,486