Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivative Assets
Derivative Assets	$ 66	$ 32
Derivative Liabilities
Derivative Liabilities	102	189
Foreign exchange contracts [Member]
Derivative Assets
Derivative Assets	92	(79)	(269)
Derivative Assets	36	(8)	(274)
Derivatives designated as hedges [Member]
Derivative Assets
Derivative Assets	50	15
Derivative Liabilities
Derivative Liabilities	99	177
Derivatives designated as hedges [Member] | Foreign exchange contracts [Member] | Other current assets [Member]
Derivative Assets
Derivative Assets	26	2
Derivatives designated as hedges [Member] | Foreign exchange contracts [Member] | Other [Member]
Derivative Assets
Derivative Assets	22	4
Derivatives designated as hedges [Member] | Foreign exchange contracts [Member] | Accounts payable and accrued liabilities [Member]
Derivative Liabilities
Derivative Liabilities	80	47
Derivatives designated as hedges [Member] | Foreign exchange contracts [Member] | Other Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	19	130
Derivatives designated as hedges [Member] | Interest rate swaps [Member] | Other current assets [Member]
Derivative Assets
Derivative Assets	2
Derivatives designated as hedges [Member] | Interest rate swaps [Member] | Other [Member]
Derivative Assets
Derivative Assets		9
Derivatives not designated as hedges [Member]
Derivative Assets
Derivative Assets	16	17
Derivative Liabilities
Derivative Liabilities	3	12
Derivatives not designated as hedges [Member] | Foreign exchange contracts [Member] | Other current assets [Member]
Derivative Assets
Derivative Assets	10	8
Derivatives not designated as hedges [Member] | Foreign exchange contracts [Member] | Other [Member]
Derivative Assets
Derivative Assets	6	9
Derivatives not designated as hedges [Member] | Foreign exchange contracts [Member] | Accounts payable and accrued liabilities [Member]
Derivative Liabilities
Derivative Liabilities	3	9
Derivatives not designated as hedges [Member] | Commodity contracts [Member] | Accounts payable and accrued liabilities [Member]
Derivative Liabilities
Derivative Liabilities		$ 3