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Discontinued Operations - Reconciliation of Reserve Under Loss Sharing Arrangement (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]
Reserve at beginning of period	$ 53	$ 82
Increase (decrease) in reserve	2	(5)
Payments to GECC	(22)	(8)
Reserve at end of period	$ 33	$ 69

Net total Increase or Decrease in the accrual for restructuring costs during the reporting period.

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