Goodwill and Intangible Assets, Net (Tables)

12 Months Ended

Mar. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the Carrying Amount of Goodwill

Changes in the carrying amount of goodwill were as follows:

(In millions)	Distribution Solutions			Technology Solutions			Total
Balance, March 31, 2013	$	4,413		$	1,992		$	6,405
Goodwill acquired	3,649			—			3,649
Amount reclassified to assets held-for-sale	(1		)	(127		)	(128		)
Acquisition accounting, transfers and other adjustments	13			(12		)	1
Foreign currency translation adjustments, net	4			(4		)	—
Balance, March 31, 2014	$	8,078		$	1,849		$	9,927
Goodwill acquired	93			—			93
Amount reclassified to assets held-for-sale	(14		)	(1		)	(15		)
Acquisition accounting, transfers and other adjustments	625			—			625
Foreign currency translation adjustments, net	(788		)	(25		)	(813		)
Balance, March 31, 2015	$	7,994		$	1,823		$	9,817

Information Regarding Intangible Assets

Information regarding intangible assets is as follows:

	March 31, 2015								March 31, 2014
(Dollars in millions)	Weighted Average Remaining Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Customer lists	8	$	2,683	$	(1,116	)	$	1,567	$	3,235	$	(863	)	$	2,372
Service agreements	15	957		(215		)	742		995		(173		)	822
Pharmacy licenses	26	874		(65		)	809		1,219		(11		)	1,208
Trademarks and trade names	15	315		(82		)	233		367		(59		)	308
Technology	3	213		(184		)	29		219		(173		)	46
Other	4	162		(101		)	61		166		(51		)	115
Total		$	5,204	$	(1,763	)	$	3,441	$	6,201	$	(1,330	)	$	4,871