Fair Value Measurements (Tables)

3 Months Ended

Jul. 31, 2019

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, 2019				July 31, 2019
	Carrying		Fair		Carrying		Fair
(Dollars in millions)	Amount		Value		Amount		Value
Assets
Cash and cash equivalents	$	307	$	307	$	307	$	307
Currency derivatives	40		40		55		55
Liabilities
Currency derivatives	6		6		8		8
Short-term borrowings	150		150		220		220
Long-term debt	2,290		2,399		2,267		2,501