Income from Continuing Operations Per Common Share (Tables)

12 Months Ended

Mar. 31, 2012

Income from Continuing Operations Per Common Share [Abstract]

Reconciliation of earnings per common share

	YEAR ENDED MARCH 31,
(in millions, except per share amounts)	2012			2011			2010
Basic income from continuing operations per common share:
Income from continuing operations	$	938		$	823		$	759
Less: Income from continuing operations allocable to participating securities		(11	)		(11	)		(8	)
Income from continuing operations allocable to common shares	$	927		$	812		$	751
Weighted average common shares outstanding		486			506			515
Basic income from continuing operations allocable per common share	$	1.91		$	1.60		$	1.46
Diluted income from continuing operations per common share:
Income from continuing operations	$	938		$	823		$	759
Add: Interest expense associated with Convertible Senior Notes (1), net of tax		—			—			21
Less: Income from continuing operations allocable to participating securities		(11	)		(11	)		(8	)
Income from continuing operations allocable to common shares	$	927		$	812		$	772
Weighted average shares outstanding and common share equivalents:
Weighted average common shares outstanding		486			506			515
Weighted average shares outstanding upon conversion of Convertible Senior Notes (1)		—			—			16
Weighted average effect of share-based payment awards		1			1			2
Denominator in calculation of diluted income per share		487			507			533
Diluted income from continuing operations per common share	$	1.90		$	1.60		$	1.45

(1) Interest expense and weighted average shares outstanding adjustments relate to the Company’s 1.625% Convertible Senior Notes that were due December 2009.