Fixed Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Components of Fixed assets
Property plant and equipment gross	$ 10,869	$ 10,166
Property plant and equipment net	4,236	3,742	3,741
Land [Member]
Components of Fixed assets
Property plant and equipment gross	199	192
Buildings [Member]
Components of Fixed assets
Property plant and equipment gross	1,195	1,122
Accumulated depreciation	(453)	(414)
Machinery and Equipment [Member]
Components of Fixed assets
Property plant and equipment gross	9,475	8,852
Accumulated depreciation	$ (6,180)	$ (6,010)

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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