Property Plant and Equipment Net (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Property Plant And Equipment Net By Type [Line Items]
Property and equipment	$ 1,024	$ 912
Internal-use software reported in property and equipment [Member]
Property Plant And Equipment Net By Type [Line Items]
Property Plant And Equipment Gross	1,600	1,379
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment	1,054	875
Property and equipment	546	504
Other Capitalized Property Plant And Equipment [Member]
Property Plant And Equipment Net By Type [Line Items]
Property Plant And Equipment Gross	1,285	1,190
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment	807	782
Property and equipment	478	408
Total Property And Equipment [Member]
Property Plant And Equipment Net By Type [Line Items]
Property Plant And Equipment Gross	2,885	2,569
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment	1,861	1,657
Property and equipment	$ 1,024	$ 912

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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