Changes in Warranty Liabilities (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Warranty Liability [Line Items]
Balance, beginning of period	$ 72	$ 85	$ 83
Amounts accrued for current period sales	20	36	41
Adjustments of prior accrual estimates	4	(4)	11
Settlements of warranty claims	(31)	(44)	(50)
Currency impact	1	(1)
Balance, end of period	$ 66	$ 72	$ 85