Valuation and Qualifying Accounts and Reserves (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Period	$ 1,415	$ 1,487	$ 1,212
Amounts charged (credited) to income	(19)	53	286
Allowance utilized	(12)	(18)	(81)
Adjustments arising from change in currency exchange rates and other items	13	(107)	70
Balance at end of period	1,397	1,415	1,487
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Period	11	18	23
Amounts charged (credited) to income		(2)	2
Allowance utilized	(3)	(5)	(7)
Balance at end of period	8	11	18
Inventory Valuation Reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Period	59	60	52
Amounts charged (credited) to income	6	9	16
Allowance utilized	(9)	(10)	(10)
Adjustments arising from change in currency exchange rates and other items	(1)		2
Balance at end of period	55	59	60
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Period	1,345	1,409	1,137
Amounts charged (credited) to income	(25)	46	268
Allowance utilized		(3)	(64)
Adjustments arising from change in currency exchange rates and other items	14	(107)	68
Balance at end of period	$ 1,334	$ 1,345	$ 1,409