Income Taxes (Tables)

12 Months Ended

Mar. 31, 2014

Income Tax Disclosure [Abstract]

Income before Income Taxes From Continuing Operations

	Years Ended March 31,
(In millions)	2014		2013		2012
Income from continuing operations before income taxes
U.S.	$	1,554	$	1,562	$	1,293
Foreign	542		366		600
Total income from continuing operations before income taxes	$	2,096	$	1,928	$	1,893

Components of Provision For Income Taxes Related to Continuing Operations

	Years Ended March 31,
(In millions)	2014			2013			2012
Current
Federal	$	484		$	(84	)	$	265
State	64			14			51
Foreign	178			40			28
Total current	726			(30		)	344
Deferred
Federal	24			538			132
State	10			80			29
Foreign	(18		)	(7		)	9
Total deferred	16			611			170
Income tax expense	$	742		$	581		$	514

Reconciliation Between Effective Tax Rate on Income From Continuing Operations and Statutory Tax Rate

	Years Ended March 31,
(In millions)	2014			2013			2012
Income tax expense at federal statutory rate	$	734		$	670		$	670
State income taxes net of federal tax benefit	57			58			56
Foreign income taxed at various rates	(166		)	(136		)	(174		)
Canadian litigation	122			—			—
Unrecognized tax benefits and settlements	(6		)	1			(18		)
Tax credits	(6		)	(13		)	(13		)
Other, net	7			1			(7		)
Income tax expense	$	742		$	581		$	514

Components of Deferred Tax Assets and Liabilities

	March 31,
(In millions)	2014			2013
Assets
Receivable allowances	$	106		$	84
Deferred revenue	136			106
Compensation and benefit related accruals	641			553
Net operating loss and credit carryforwards	430			341
Other	289			281
Subtotal	1,602			1,365
Less: valuation allowance	(270		)	(118		)
Total assets	1,332			1,247
Liabilities
Inventory valuation and other assets	(2,163		)	(2,089		)
Fixed assets and systems development costs	(321		)	(267		)
Intangibles	(1,531		)	(734		)
Other	(118		)	(24		)
Total liabilities	(4,133		)	(3,114		)
Net deferred tax liability	$	(2,801	)	$	(1,867	)
Current net deferred tax asset	$	51		$	16
Current net deferred tax liability	(1,588		)	(1,626		)
Long-term deferred tax asset	19			21
Long-term deferred tax liability	(1,283		)	(278		)
Net deferred tax liability	$	(2,801	)	$	(1,867	)

Gross Unrecognized Tax Benefits

	Years Ended March 31,
(In millions)	2014			2013			2012
Unrecognized tax benefits at beginning of period	$	560		$	595		$	635
Additions based on tax positions related to prior years	106			46			11
Reductions based on tax positions related to prior years	(31		)	(108		)	(72		)
Additions based on tax positions related to current year	23			31			37
Reductions based on settlements	(4		)	(2		)	(1		)
Reductions based on the lapse of the applicable statutes of limitations	(7		)	(2		)	(15		)
Unrecognized tax benefits at end of period	$	647		$	560		$	595