Segment and Geographic Information 2 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Mar. 31, 2013
Information about Company by geographic area
Total revenue	$ 4,262		$ 4,412		$ 4,504
Property and equipment, net	252		295		311
Total assets	10,979		12,016		11,815
Total liabilities	5,354		6,446		6,365
From Unaffiliated Customers
Information about Company by geographic area
Total revenue	4,262		4,412		4,504
Between Geographic Areas
Information about Company by geographic area
Total revenue	0	[1]	0	[1]	0	[1]
United States
Information about Company by geographic area
Total revenue	3,053		3,091		3,139
Property and equipment, net	112		125		138
Total assets	8,128		8,908		8,897
Total liabilities	4,047		4,919		4,802
United States | From Unaffiliated Customers
Information about Company by geographic area
Total revenue	2,615		2,645		2,679
United States | Between Geographic Areas
Information about Company by geographic area
Total revenue	438	[1]	446	[1]	460	[1]
EMEA
Information about Company by geographic area
Total revenue	1,008	[2]	1,093	[2]	1,106	[2]
Property and equipment, net	97	[2]	116	[2]	108	[2]
Total assets	1,874	[2]	2,076	[2]	1,911	[2]
Total liabilities	809	[2]	890	[2]	939	[2]
EMEA | From Unaffiliated Customers
Information about Company by geographic area
Total revenue	1,008	[2]	1,093	[2]	1,106	[2]
EMEA | Between Geographic Areas
Information about Company by geographic area
Total revenue	0	[1],[2]	0	[1],[2]	0	[1],[2]
Other
Information about Company by geographic area
Total revenue	639		674		719
Property and equipment, net	43		54		65
Total assets	977		1,032		1,007
Total liabilities	498		637		624
Other | From Unaffiliated Customers
Information about Company by geographic area
Total revenue	639		674		719
Other | Between Geographic Areas
Information about Company by geographic area
Total revenue	0	[1]	0	[1]	0	[1]
Eliminations
Information about Company by geographic area
Total revenue	(438)		(446)		(460)
Property and equipment, net	0		0		0
Total assets	0		0		0
Total liabilities	0		0		0
Eliminations | From Unaffiliated Customers
Information about Company by geographic area
Total revenue	0		0		0
Eliminations | Between Geographic Areas
Information about Company by geographic area
Total revenue	$ (438)	[1]	$ (446)	[1]	$ (460)	[1]

[1] Represents royalties from foreign subsidiaries determined as a percentage of certain amounts invoiced to customer.

[2] Consists of Europe, the Middle East and Africa.