Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization expense of acquisition-related intangible assets	$ 884	$ 441	$ 314
Amortization expense	974	455	329
Patents and developed technology
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, weighted-average useful life (in years)	8 years 1 month 6 days
Customer relationships
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, weighted-average useful life (in years)	6 years 7 months 6 days
Trade names and other
Goodwill and Intangible Assets Disclosure [Line Items]
Intangible assets, weighted-average useful life (in years)	5 years 9 months 18 days
Discontinued Operations
Goodwill and Intangible Assets Disclosure [Line Items]
Amortization expense	$ 70