Stockholders' Equity (Tables)

12 Months Ended

Mar. 31, 2014

Stockholders' Equity Note [Abstract]

Schedule of Shares Repurchased Over Last Three Years

	Share Repurchases (1)
(In millions, except price per share data)		Total Number of Shares Purchased (2) (3)	Average Price Paid Per Share		Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs
Balance, March 31, 2011					$	499
Share repurchase plans approved:
April 2011					1,000
January 2012					650
Shares repurchased		20	$	83.47	(1,850		)
Balance, March 31, 2012					$	299
Share repurchase plans approved:
April 2012					700
January 2013					500
Shares repurchased		13	$	100.82	(1,159		)
Balance, March 31, 2013					$	340
Shares repurchased		—	$	—	—
Balance, March 31, 2014					$	340

(1) This table does not include shares tendered to satisfy the exercise price in connection with cashless exercises of employee stock options or shares tendered to satisfy tax withholding obligations in connection with employee equity awards.

(2) All of the shares purchased were part of the publicly announced programs.

(3) The number of shares purchased reflects rounding adjustments.

Schedule of Comprehensive Income (Loss) [Table Text Block]

	Years Ended March 31,
(In millions)	2014			2013			2012
Foreign currency translation adjustments
Foreign currency translation adjustments arising during period, net of income tax expense (benefit) of nil, ($2) and $2 (1)	$	9		$	(52	)	$	(56	)
Reclassified to income statement, net of income tax expense of $24, nil and nil (2)	44			—			—
	53			(52		)	(56		)
Unrealized losses on cash flow hedges
Unrealized losses on cash flow hedges arising during period, net of income tax benefit of nil, nil and nil	(6		)	—			(5		)
Changes in retirement-related benefit plans
Net actuarial gain (loss) and prior service credit (cost) arising during period, net of income tax (benefit) of $16, ($22) and ($18)	17			(40		)	(38		)
Amortization of actuarial loss, prior service cost and transition obligation, net of income tax expense of $12, $12 and $9 (3)	22			18			17
Foreign currency translation adjustments, net of income tax expense of nil, nil and nil	(4		)	4			—
Reclassified to income statement, net of income tax expense of $1, nil and nil	1			—			—
	36			(18		)	(21		)
Other Comprehensive Income (Loss), net of tax	$	83		$	(70	)	$	(82	)

(1) The 2014 amounts include net foreign currency translation gain of $21 million attributable to noncontrolling interests.

(2) As a result of our sale of our 49% equity interest in Nadro, foreign currency translation net losses of $44 million were reclassified from AOCI to other income, within our consolidated statement of operations. Such losses were previously considered in our impairment evaluation of the investment when we committed to a plan to sell the investment during the fourth quarter of 2013, and accordingly did not impact earnings for 2014.

(3) Pre-tax amount was reclassified into cost of sales and operating expenses in the consolidated statements of operations. The related tax expense (benefit) was reclassified into income tax expense in the consolidated statements of operations.

Accumulated Other Comprehensive Income

(In millions)	Foreign Currency Translation Adjustments, Net of Tax			Unrealized Losses on Cash Flow Hedges, Net of Tax			Unrealized Net Loss and Other Components of Benefit Plans, Net of Tax			Total Accumulated Other Comprehensive Income (Loss)
Balance at March 31, 2012	$	188		$	(5	)	$	(178	)	$	5
Other comprehensive loss before reclassifications	(52		)	—			(18		)	(70		)
Other comprehensive loss	(52		)	—			(18		)	(70		)
Balance at March 31, 2013	$	136		$	(5	)	$	(196	)	$	(65	)
Other comprehensive income (loss) before reclassifications	(12		)	(6		)	35			17
Amounts reclassified to earnings	44			—			1			45
Other comprehensive income (loss)	32			(6		)	36			62
Balance at March 31, 2014	$	168		$	(11	)	$	(160	)	$	(3	)