Property, Net Of Accumulated Depreciation (Schedule Of Property, Net) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Property, Net Of Accumulated Depreciation [Abstract]
Land	$ 111	$ 113
Buildings	3,986	3,957
Equipment	11,986	11,886
Construction in progress	2,154	1,919
Property, plant and equipment, gross	18,237	17,875
Accumulated depreciation	(7,486)	(7,204)
Total	$ 10,751	$ 10,671

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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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- Definition

Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Gross amount, at the balance sheet date, of long-lived assets under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.

+ References

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- Definition

Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.

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- Definition

Gross amount, as of the balance sheet date, of long-lived, depreciable assets used in the production process to produce goods and services.

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- Definition

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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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 7

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-Name Statement of Financial Accounting Standard (FAS)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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