Depreciation And Amortization	6 Months Ended
Depreciation And Amortization	Jun. 30, 2012
Depreciation, Depletion and Amortization [Abstract]
Disclosure Of Depreciation Depletion And Amortization [Text Block]	Depreciation and Amortization Accumulated depreciation of owned equipment and property at June 30, 2012 and December 31, 2011 was $10.1 billion and $9.9 billion, respectively. Accumulated amortization of equipment and property under capital leases at June 30, 2012 and December 31, 2011 was $197 million and $448 million, respectively.

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. 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. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

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