Long-Lived Assets 1 (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Property and equipment
Property and equipment, gross	$ 1,097	$ 1,093
Accumulated depreciation and amortization	(786)	(707)
Property and equipment, net	311	386	437
Land and Buildings [Member]
Property and equipment
Property and equipment, gross	210	224
Equipment, Software Developed For Internal Use, Furniture and Leasehold Improvements [Member]
Property and equipment
Property and equipment, gross	$ 887	$ 869

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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