Valuation and Qualifying Accounts and Reserves (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 1,397	$ 1,415	$ 1,487
Amounts charged (credited) to income	(107)	(19)	53
Allowance utilized	(92)	(12)	(18)
Adjustments arising from change in currency exchange rates and other items	45	13	(107)
Balance at end of period	1,243	1,397	1,415
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	8	11	18
Amounts charged (credited) to income	1		(2)
Allowance utilized	(1)	(3)	(5)
Balance at end of period	8	8	11
Inventory Valuation Reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	55	59	60
Amounts charged (credited) to income	6	6	9
Allowance utilized	(12)	(9)	(10)
Adjustments arising from change in currency exchange rates and other items	2	(1)
Balance at end of period	51	55	59
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	1,334	1,345	1,409
Amounts charged (credited) to income	(114)	(25)	46
Allowance utilized	(79)		(3)
Adjustments arising from change in currency exchange rates and other items	43	14	(107)
Balance at end of period	$ 1,184	$ 1,334	$ 1,345