Derivative Instruments and Hedging Activities - Effect of Derivative Instruments in Cash Flow Hedging Relationships on Income and Other Comprehensive Loss (OCI) (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended	12 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Foreign exchange contracts [Member]	Jun. 30, 2012 Foreign exchange contracts [Member]	Jun. 30, 2013 Foreign exchange contracts [Member]	Jun. 30, 2012 Foreign exchange contracts [Member]	Jun. 30, 2013 Foreign exchange contracts [Member] Cost of revenue [Member]	Jun. 30, 2012 Foreign exchange contracts [Member] Cost of revenue [Member]	Jun. 30, 2013 Foreign exchange contracts [Member] Cost of revenue [Member]	Jun. 30, 2012 Foreign exchange contracts [Member] Cost of revenue [Member]	Jun. 30, 2013 Foreign exchange contracts [Member] Research & engineering [Member]	Jun. 30, 2012 Foreign exchange contracts [Member] Research & engineering [Member]	Jun. 30, 2013 Foreign exchange contracts [Member] Research & engineering [Member]	Jun. 30, 2012 Foreign exchange contracts [Member] Research & engineering [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCL into Income	$ 19	$ 66	$ 34	$ (260)	$ (45)	$ (150)	$ 38	$ (257)	$ (41)	$ (145)	$ (4)	$ (3)	$ (4)	$ (5)