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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, 2013	Mar. 31, 2012
Other Expenses [Abstract]
Acquisition costs	$ 15	$ 13
Restructuring charges, net	(1)	8
Total acquisition and restructuring costs	$ 14	$ 21

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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