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Warranty Accrual Rollforward (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance January 1,	$ 23	$ 26
Accruals related to product warranties	6	7
Reductions for payments made	(9)	(9)
Ending Balance June 30,	$ 20	$ 24

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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