Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization expense of acquisition-related intangible assets	$ 441	$ 314	$ 266
Patents and developed technology
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, weighted-average useful life (in years)	5.0
Customer relationships
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, weighted-average useful life (in years)	6.1
Trade names and other
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, weighted-average useful life (in years)	4.3