Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Jan. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill [Table Text Block]

The following table shows the changes in goodwill (which includes no accumulated impairment losses) and other intangible assets during the nine months ended January 31, 2020:

(Dollars in millions)	Goodwill		Other Intangible Assets
Balance at April 30, 2019	$	753	$	645
Acquisition (Note 15)	11		12
Foreign currency translation adjustment	1		(3		)
Balance at January 31, 2020	$	765	$	654