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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
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