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Fixed Assets (Details 1) (USD $) In Millions	3 Months Ended		6 Months Ended
Fixed Assets (Details 1) (USD $) In Millions	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Fixed Assets (Textuals) [Abstract]
Depreciation expense relating to fixed assets	$ 669	$ 558	$ 1,330	$ 1,105

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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