Discontinued Operations.

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Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Tax expense or benefit on the gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items before deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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Revenue from multiple-deliverable arrangements that include licensing fees and maintenance revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Maintenance revenue is derived from maintenance services provided under contracts or arrangements with clients. Services may include the maintenance of software, plant and equipment, and facilities.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

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Revenue from providing technology services. The services may include training, installation, engineering or consulting. Consulting services often include implementation support, software design or development, or the customization or modification of the licensed software.

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Divestitures (Details) (USD $) In Millions	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		1 Months Ended
Divestitures (Details) (USD $) In Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2010 Segment, Discontinued Operations [Member]	Sep. 30, 2011 Segment, Discontinued Operations [Member]	Sep. 30, 2010 Segment, Discontinued Operations [Member]	Jun. 30, 2010 Information Governance Business [Member]	Jun. 30, 2011 Internet Security Business [Member]
REVENUE
Subscription and maintenance revenue	$ 1,022	$ 939	$ 2,029	$ 1,878	$ 22	$ 15	$ 46
Professional services	96	79	186	157			1
TOTAL REVENUE	1,200	1,088	2,363	2,157	22	15	47
Discontinued Operations (Textual) [Abstract]
Selling price								19	14
Gain (loss) upon disposal			23	(5)				(5)	23
Tax expenses related to loss on disposal								4	18
Income tax expense (benefit)	91	71	196	158	2	(6)	3
Income (loss) from discontinued components
(Loss) income from operations of discontinued components, net of tax expense (benefit)		3	(10)	4
Gain (loss) on disposal of discontinued components, net of taxes			23	(5)				(5)	23
Income (loss) from discontinued operations, net of taxes	$ 0	$ 3	$ 13	$ (1)