Fixed Assets - Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Land	$ 366	$ 362
Buildings & improvements	3,209	2,912
Machinery & equipment	27,690	24,404
Seismic vessels	1,903	1,873
Property, plant and equipment	33,168	29,551
Less accumulated depreciation	18,388	16,558
Fixed assets less accumulated depreciation	$ 14,780	$ 12,993	$ 12,071

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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