Long-Lived Assets 3 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Depreciation and amortization expense
Depreciation	$ 71	$ 84	$ 104
Total depreciation and amortization expense	402	415	463
Purchased Software Products
Depreciation and amortization expense
Amortization of intangible assets	124	116	162	[1]
Internally Developed Software Products
Depreciation and amortization expense
Amortization of intangible assets	149	155	143
Other Intangible Assets
Depreciation and amortization expense
Amortization of intangible assets	$ 58	$ 60	$ 54

[1] Amount includes impairment recorded in fiscal year 2013 of approximately $55 million relating to purchased software (see Note 6, “Long Lived Assets,” in the Notes to the Consolidated Financial Statements for additional information).