Commitments and Contingencies Commitments and Contingencies (Legal Proceedings) (Details) (Pending Litigation [Member])	Apr. 02, 2012 United States District Court for the Northern District of California [Member] lawsuits_filed	Feb. 29, 2012 United States District Court for the Northern District of California [Member] lawsuits_filed	Feb. 24, 2012 United States District Court for the Northern District of California [Member] lawsuits_filed	Feb. 13, 2012 United States District Court for the Northern District of California [Member] lawsuits_filed	Jan. 27, 2012 United States District Court for the Northern District of California [Member] lawsuits_filed	Jan. 13, 2012 United States District Court for the Northern District of California [Member] lawsuits_filed	May 02, 2012 Superior Court of California, Santa Clara County [Member] lawsuits_filed	Feb. 09, 2012 Superior Court of California, Santa Clara County [Member] lawsuits_filed	Nov. 23, 2011 Superior Court of California, Santa Clara County [Member] lawsuits_filed
Loss Contingencies [Line Items]
Shareholder suits	1	1	1	1	1	1	1	1	1