Earnings Per Common Share (Tables)

6 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Basic And Diluted Earnings Per Common Share

The computations for basic and diluted earnings per common share are as follows:

	Quarter Ended September 30,				Six Months Ended September 30,
(In millions, except per share amounts)	2012		2011		2012		2011
Net income	$	401	$	296	$	781	$	582
Weighted average common shares outstanding:
Basic	236		246		236		247
Effect of dilutive securities:
Options to purchase common stock	1		1		1		2
Restricted stock units	3		3		3		3
Diluted	240		250		240		252
Earnings per common share: (1)
Diluted	$	1.67	$	1.18	$	3.25	$	2.31
Basic	$	1.70	$	1.20	$	3.31	$	2.35

⁽¹⁾  Certain computations may reflect rounding adjustments.