Fair Value Measurements (Tables)

9 Months Ended

Jan. 31, 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:

	April 30, 2020				January 31, 2021
	Carrying		Fair		Carrying		Fair
(Dollars in millions)	Amount		Value		Amount		Value
Assets
Cash and cash equivalents	$	675	$	675	$	1,106	$	1,106
Currency derivatives	78		78		6		6
Liabilities
Currency derivatives	2		2		28		28
Short-term borrowings	333		333		312		312
Long-term debt	2,269		2,486		2,347		2,749