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Finance Assets, Net (Schedule Of Allowance For Losses On Finance Assets) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Schedule of Investments [Line Items]
Balance at beginning of year	$ 227	$ 202
Decrease to Allowance	(10)	(35)
Amounts written-off	(118)	0
Balance at September 30	$ 99	$ 167

- Definition

Reflects the sum for the period of the additions and reductions to the loan loss reserve, which when added to the opening balance of the reserve will agree to the ending balance in the reserve.

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