Litigation and Other Legal Matters Litigation and Other Legal Matters (Details)  | 
 Dec. 29, 2015  
action 
 | 
 Dec. 21, 2015  
action 
 | 
 Nov. 10, 2015  
action 
 | 
 Oct. 21, 2015  
stockholder 
 | 
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| Merger-related litigation | ||||
| Loss Contingencies [Line Items] | ||||
| Number of actions filed | 4 | |||
| California class actions | ||||
| Loss Contingencies [Line Items] | ||||
| Number of actions filed | 3 | |||
| Delaware Chancery Court class action | ||||
| Loss Contingencies [Line Items] | ||||
| Number of actions filed | 1 | |||
| KLA-Tencor | California class actions | ||||
| Loss Contingencies [Line Items] | ||||
| Number of stockholders filing putative class actions | stockholder | 4 | 
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- Definition Loss Contingency, Number Of Stockholders Filing Actions No definition available. 
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- Definition Loss Contingency, Number of Actions Filed No definition available. 
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