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Restructuring and Other Charges (Details) (Severance [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Severance [Member]
Restructuring Cost and Reserve Roll Forward
Restructuring Reserve, Beginning Balance	$ 7
Expense	8
Cash Payments	(13)
Reserve Adjustments	(1)
Restructuring Reserve, Ending Balance	$ 1

Amount of any reversal and other adjustment made during the period to the amount of a previously accrued liability for a specified type of restructuring cost, excluding adjustments for costs incurred during the period, costs settled during the period, and foreign currency translation adjustments.

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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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