Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Apr. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets and Goodwill [Table Text Block]

The following table shows the changes in goodwill (which include no accumulated impairment losses) and other intangible assets over the past two years:

	Goodwill			Other Intangible Assets
Balance as of April 30, 2015	$	607		$	611
Sale of business (Note 16)	(16		)	(22		)
Foreign currency translation adjustment	(1		)	6
Balance as of April 30, 2016	590			595
Acquisition of business (Note 17)	183			65
Foreign currency translation adjustment	(20		)	(19		)
Balance as of April 30, 2017	$	753		$	641