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Warranty Accrual Rollforward (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning Balance January 1,	$ 23	$ 26
Accruals related to product warranties	2	5
Reductions for payments made	(4)	(4)
Ending Balance March 31,	$ 21	$ 27

- 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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