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Discontinued Operations - Reconciliation of Reserve Under Loss Sharing Arrangement (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Reserve at beginning of period	$ 53	$ 82
Increase (decrease) in reserve	2	(8)
Payments to GECC	(23)	(21)
Reserve at end of period	$ 32	$ 53

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.