Acquisition-Related Intangible Assets that are being Amortized (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,186	$ 3,098
Accumulated Amortization	1,645	1,520
Net Carrying Value	1,541	1,578
Patents and developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,533	1,451
Accumulated Amortization	758	698
Net Carrying Value	775	753
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,288	1,288
Accumulated Amortization	625	573
Net Carrying Value	663	715
Trade names and other
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	365	359
Accumulated Amortization	262	249
Net Carrying Value	$ 103	$ 110