Special Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2012	Dec. 31, 2011
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Special charges	$ 70	$ 219
Severance and benefits costs, number of employees impacted	50	550
Intangible asset impairment charges		52
CRM [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Special charges	42
Severance and benefits costs, number of employees impacted		650
Fixed Asset Charges [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Impairment charges		26.0
Fixed Asset Charges [Member] \| CRM [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Impairment charges		12.0
Fixed Asset Charges [Member] \| Cost Of Sales [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Impairment charges		9.0
Employee Termination Costs [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Severance and benefit costs	16	82
Employee Termination Costs [Member] \| Cost Of Sales [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Severance and benefit costs	5	9
Inventory Charges [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Special charges, inventory obsolescence charges	9	20
Other [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Restructuring reserve period expense	45	39
Restructuring reserve period expense contract termination	4	7
Legal settlement charge	28	4
Other [Member] \| CRM [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Restructuring reserve period expense	9	21
Idle facility costs		4
Pension settlement charges		13
Other [Member] \| Cost Of Sales [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Restructuring reserve period expense	9	10
Other Costs [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Restructuring reserve period expense	4	7
Intangible Asset Charges [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Intangible asset impairment charges		52
Intangible Assets [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Purchased technology and patents	12
Customer Lists And Relationships [Member] \| Intangible Asset Charges [Member]
Purchased In-Process Research And Development (IPR&D) And Special Charges [Line Items]
Intangible asset impairment charges		$ 49

Defined benefit plan pension settlement charge.

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Idle facility costs.

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Restructuring reserve period expense contract termination.

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Includes costs associated with cost of sales expenses and operating expenses that are unusual or infrequent in occurrence (such as restructuring, remediation, impairment charges and certain litigation charges).

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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.

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Charge to cost of goods sold that represents the reduction of the carrying amount of inventory, generally attributable to obsolescence or market conditions.

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The charge against earnings in the period to increase loss contingency liabilities, net of any adjustments to reduce previously estimated charges.

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The charge against earnings in the period, comprised of costs associated with restructuring activities not otherwise specified in the taxonomy pursuant to a duly authorized plan, excluding a discontinued operation as defined by generally accepted accounting principles. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, but excludes costs associated with the retirement of a long-lived asset and severance costs associated with established compensation plans.

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