Accounting Policies (Tables)

12 Months Ended

Apr. 30, 2013

Accounting Policies [Abstract]

Basic and diluted earnings per share

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

	2011			2012		2013
Basic and diluted net income	$	572		$	513	$	591
Income allocated to participating securities	(1		)	—		—
Net income available to common stockholders	$	571		$	513	$	591
Share data (in thousands):
Basic average common shares outstanding	218,405			214,529		213,369
Dilutive effect of stock-based awards	1,365			1,554		1,617
Diluted average common shares outstanding	219,770			216,083		214,986
Basic earnings per share	$	2.61		$	2.39	$	2.77
Diluted earnings per share	$	2.60		$	2.37	$	2.75