Losses associated with the earthquake in Japan (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Number of Semiconductor wafer fab facilities damaged in earthquake (in number of facilities)	2	2
Semiconductor wafer fab facilities owned in Japan (in number of facilities)	3	3
Total amount of recorded expenses on property damages incurred and costs associated with business interruption in Japan	$ 50,000,000	$ 80,000,000
Proceeds from ongoing insurance claims		$ 0