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Acquisition And Restructuring Costs (Costs Related To Acquisition And Restructuring) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Other Expenses [Abstract]
Acquisition Costs, Period Cost	$ 13	$ 14
Restructuring Charges	8	5
Total Of Acquisition And Restructuring Costs	$ 21	$ 19

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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