Earnings Per Share (Tables)

12 Months Ended

Mar. 31, 2016

Earnings Per Share Reconciliation [Abstract]

Computation Of Basic Earnings And Diluted Earnings Per Share

	Year Ended March 31,
(In millions, except per share amounts)	2016		2015		2014
Net income	$	1,156	$	875	$	8
Shares used to compute earnings per share:
Weighted-average common stock outstanding — basic	310		311		308
Dilutive potential common shares related to stock award plans and from assumed exercise of stock options	6		9		8
Dilutive potential common shares related to the Convertible Notes	6		4		—
Dilutive potential common shares related to the Warrants	8		1		—
Weighted-average common stock outstanding — diluted	330		325		316
Earnings per share:
Basic	$	3.73	$	2.81	$	0.03
Diluted	$	3.50	$	2.69	$	0.03