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Restructuring (Summary Of Changes To Restructuring-Related Liabilities) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 North America [Member]	Sep. 30, 2012 International [Member]	Sep. 30, 2012 Personnel Related [Member]	Sep. 30, 2012 Facility Related [Member]	Dec. 31, 2011 Facility Related [Member]
Restructuring Cost and Reserve [Line Items]
Balance as of January 1, 2012		$ 2		$ 1	$ 1	$ 1	$ 1	$ 1
Restructuring expense	7	26	1	1	25	26
Cash payment/utilization		(17)		(1)	(16)	(17)
Balance as of September 30, 2012	$ 11	$ 11		$ 1	$ 10	$ 10	$ 1	$ 1

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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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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