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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value.

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Describes uncertainties pertaining to economic life of products, which is normal in high-tech industries, or services.

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Long-Lived Assets 6 (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Long-Lived Assets [Abstract]
Accumulated goodwill impairment losses	$ 111	$ 111
Goodwill impairments	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss	0us-gaap_GoodwillImpairmentLoss
Enterprise Solutions
Finite-Lived Intangible Assets
Impairment	21
Uncertainty, Continued marketability of goods and services	The Company evaluates the useful lives and recoverability of capitalized software and other intangible assets when events or changes in circumstances indicate that an impairment may exist. These evaluations require complex assumptions about key factors such as future customer demand, technology trends and the impact of those factors on the technology the Company acquires and develops for its products. Impairments or revisions to useful lives could result from the use of alternative assumptions that reflect reasonably possible outcomes related to future customer demand or technology trends for assets within the Enterprise Solutions segment.
Internally Developed Software Products \| Enterprise Solutions
Finite-Lived Intangible Assets
Impairment	9	6	2
Purchased Software Products
Finite-Lived Intangible Assets
Impairment		0	55
Purchased Software Products \| Enterprise Solutions
Finite-Lived Intangible Assets
Impairment	$ 12		$ 55