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Other Expenses (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Restructuring Charges
Balance, beginning of period	$ 21	$ 0
Restructuring charges	54	101
Cash payments	(40)	(66)
Balance, end of period	35	35
Restructuring charges incurred in current period	54	101
Total restructuring charges incurred since inception of initiative	$ 101	$ 101

Amount of costs incurred to date for the specified type of restructuring cost.

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- Definition

Discloses the amount charged against the accrued restructuring reserves, or earnings if not previously accrued, during the period for the specified type of restructuring cost.

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- Definition

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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