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Receivables, Net (Details1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Aggregate rollforward of the allowance for doubtful accounts
Allowance for doubtful accounts - January 1	$ 13	$ 21	$ 12
Charges (benefits) to income	2	(3)	13
Write-offs	(1)	(3)	(3)
Allowance for doubtful accounts - December 31	13	13	21
Foreign currency and other	$ (1)	$ (2)	$ (1)

Reflects the net gain (loss) from converting reserves for credit losses of consolidated entities which are stated in a foreign currency into the currency used in the financial statements.

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- Definition

Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses.

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- Definition

Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

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