Business Combinations (Details 1) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2011 Year Month Investment
Purchased Intangible Assets
Purchased intangible assets	$ 233
Intangible Assets, Useful Life, Minimum	1
Intangible Assets, Useful Life, Maximum	15
Developed technology [Member]
Purchased Intangible Assets
Purchased intangible assets	148
Intangible Assets, Useful Life, Minimum	4
Intangible Assets, Useful Life, Maximum	13
In-process research and development [Member]
Purchased Intangible Assets
Purchased intangible assets	45
Intangible Assets, Useful Life, Minimum	8
Intangible Assets, Useful Life, Maximum	10
Customer relationships [Member]
Purchased Intangible Assets
Purchased intangible assets	37
Intangible Assets, Useful Life, Minimum	3
Intangible Assets, Useful Life, Maximum	8
Other [Member]
Purchased Intangible Assets
Purchased intangible assets	$ 3
Intangible Assets, Useful Life, Minimum	1
Intangible Assets, Useful Life, Maximum	10