Valuation and Qualifying Accounts (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$ 128		$ 139		$ 118
Valuation Allowances and Reserves, Charged to Cost and Expense	12		32		41
Valuation Allowances and Reserves, Charged to Other Accounts	(2)	[1]	(6)	[1]	(1)	[1]
Valuation Allowances and Reserves, Deductions	(11)	[2]	(37)	[2]	(19)	[2]
Valuation Allowances and Reserves, Balance	127		128		139
Inventory Valuation Reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	302		359		273
Valuation Allowances and Reserves, Charged to Cost and Expense	199		144		240
Valuation Allowances and Reserves, Charged to Other Accounts	4	[1]	(10)	[1]	(3)	[1]
Valuation Allowances and Reserves, Deductions	(221)	[2]	(191)	[2]	(151)	[2]
Valuation Allowances and Reserves, Balance	284		302		359
Deferred tax asset valuation allowance
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	116		118		144
Valuation Allowances and Reserves, Charged to Cost and Expense	10		11		13
Valuation Allowances and Reserves, Charged to Other Accounts	(4)	[1]	(4)	[1]	21	[1]
Valuation Allowances and Reserves, Deductions	(18)	[2]	(9)	[2]	(60)	[2]
Valuation Allowances and Reserves, Balance	$ 104		$ 116		$ 118

[1] Valuation accounts of acquired or divested companies and foreign currency translation adjustments.

[2] Deductions from reserves includes the write-off of previously reserved inventory that was used in research and development (R&D) and recorded in R&D expenses in the year reserved.