Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment
Property, plant and equipment (Note G)	$ 40,124	$ 40,289
Less: Accumulated depreciation (Note G)	26,241	26,193
Property, plant and equipment - net (Note G)	13,883	14,096
Land and land improvements
Property, Plant and Equipment
Property, plant and equipment (Note G)	786	777
Buildings and building improvements
Property, Plant and Equipment
Property, plant and equipment (Note G)	9,531	9,414
Plant, laboratory and office equipment
Property, Plant and Equipment
Property, plant and equipment (Note G)	26,843	26,676
Plant and other property
Property, Plant and Equipment
Property, plant and equipment (Note G)	37,160	36,867
Less: Accumulated depreciation (Note G)	24,703	24,435
Property, plant and equipment - net (Note G)	12,457	12,432
Rental machines
Property, Plant and Equipment
Property, plant and equipment (Note G)	2,964	3,422
Less: Accumulated depreciation (Note G)	1,538	1,758
Property, plant and equipment - net (Note G)	$ 1,426	$ 1,665

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, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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