Fixed Assets - Components of Fixed Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	$ 12,798	$ 10,869
Property plant and equipment, net	5,273	4,236	3,742
Land [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	238	199
Building [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	1,513	1,195
Accumulated depreciation	(541)	(453)
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property plant and equipment, gross	11,047	9,475
Accumulated depreciation	$ (6,984)	$ (6,180)

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 of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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