Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Jul. 31, 2019

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 three months ended July 31, 2019:

(Dollars in millions)	Goodwill			Other Intangible Assets
Balance at April 30, 2019	$	753		$	645
Acquisition (Note 15)	11			12
Foreign currency translation adjustment	(10		)	(3		)
Balance at July 31, 2019	$	754		$	654