Acquisitions/Divestitures: (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012 Y entity
Acquisitions:
Businesses acquired, number (in entities)	5
Businesses acquired, aggregate cost	$ 1,441
Percentage of business acquired (as a percent)	100.00%
Acquired intangible asset, weighted average useful life (in years)	6.9
Current assets	169
Fixed assets/noncurrent	100
Goodwill	1,067
Total assets acquired	1,734
Current liabilities	(104)
Noncurrent liabilities	(189)
Total liabilities assumed	(292)
Total purchase price	1,441
Completed technology
Acquisitions:
Intangible assets	252
Amortization life (in years)	7
Client relationships
Acquisitions:
Intangible assets	115
Amortization life (in years)	7
Patents/trademarks
Acquisitions:
Intangible assets	22
Amortization life, minimum (in years)	1
Amortization life, maximum (in years)	7
IPR and D
Acquisitions:
Intangible assets	9
Other Acquisitions \| Systems and Technology
Acquisitions:
Goodwill	221
Other Acquisitions \| Software.
Acquisitions:
Goodwill	$ 846

The number of acquisitions completed during the period.

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The aggregate amount assigned to a major class of finite-lived intangible assets acquired either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

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-Name Statement of Financial Accounting Standard (FAS)

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The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

+ References

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- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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- Definition

Percentage of voting equity interests acquired in the business combination.

+ References

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The amount of acquisition cost of a business combination allocated to assets acquired.

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The total purchase price of the acquired entity. This includes cash paid to equity interest holders of the acquired entity, fair value of debt and equity securities issued to equity holders of the acquired entity, and transaction costs paid to third parties to consummate the acquisition.

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The amount of acquisition cost of a business combination allocated to current assets.

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The amount of acquisition cost of a business combination allocated to current liabilities of the acquired entity.

+ References

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-Publisher FASB

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- Definition

Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

+ References

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-Publisher FASB

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The amount of acquisition cost of a business combination allocated to liabilities assumed.

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The amount of acquisition cost of a business combination allocated to noncurrent liabilities of the acquired entity.

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- Definition

The amount of acquisition cost of a business combination allocated to property, plant and equipment to be used in ongoing operations.

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- Definition

The average useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

+ References

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The maximum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

+ References

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The minimum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.

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