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Agreement to Acquire Ultratech (Details) - Ultratech, Inc. - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 02, 2017
Dec. 31, 2016
Agreement to Acquire Ultratech    
Cash to be received by acquiree (in dollars per share) $ 21.75  
Number of shares to be received by acquiree 0.2675  
Transaction consideration (in dollars per share) $ 29.07  
Total transaction value   $ 820
Value of net assets acquired, net of cash balances   $ 553