Earnings Per Share (Tables)

9 Months Ended

Jan. 31, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents information concerning basic and diluted earnings per share:

	Three Months Ended				Nine Months Ended
	January 31,				January 31,
(Dollars in millions, except per share amounts)	2017		2018		2017		2018
Net income available to common stockholders	$	182	$	190	$	524	$	607
Share data (in thousands):
Basic average common shares outstanding	480,650		480,361		486,105		480,193
Dilutive effect of stock-based awards	3,308		3,883		3,515		3,318
Diluted average common shares outstanding	483,958		484,244		489,620		483,511
Basic earnings per share	$	0.38	$	0.39	$	1.08	$	1.26
Diluted earnings per share	$	0.38	$	0.39	$	1.07	$	1.25