Fair Value Measurements (Tables)

6 Months Ended

Oct. 31, 2017

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, 2017				October 31, 2017
	Carrying		Fair		Carrying		Fair
(Dollars in millions)	Amount		Value		Amount		Value
Assets:
Cash and cash equivalents	$	182	$	182	$	212	$	212
Currency derivatives	25		25		3		3
Liabilities:
Currency derivatives	10		10		21		21
Short-term borrowings	211		211		235		235
Current portion of long-term debt	249		249		250		249
Long-term debt	1,689		1,752		1,719		1,791