Annual report pursuant to Section 13 and 15(d)

Contingencies (Details)

v3.7.0.1
Contingencies (Details)
$ in Millions
 1 Months Ended 12 Months Ended
Jul. 31, 2016
USD ($)
May 31, 2016
USD ($)
Jan. 31, 2016
USD ($)
Oct. 31, 2015
USD ($)
Jan. 31, 2014
USD ($)
Nov. 30, 2012
Jun. 30, 2004
Jul. 31, 2017
USD ($)
Jul. 31, 2016
USD ($)
Jul. 31, 2014
USD ($)
Jun. 30, 2014
USD ($)
Contingencies (Details) [Line Items]                      
Gain Contingency, Patents Allegedly Infringed upon, Number             6        
Number of Licensee Patents               4      
Gain Contingency, Patents Found Not Infringed upon, Number           1          
Gain Contingencies Prejudgement Interest         $ 12.5            
Period Over Which Settlement Amount Has to Be Paid                   5 years  
Number of Pending Cases               7      
Subpoena [Member]                      
Contingencies (Details) [Line Items]                      
Estimated Litigation Settlement Amount                   $ 2.0  
Additional Payment of Litigation Settlement Amount                 $ 1.5    
Total Liability For Settlement Agreement               $ 0.8      
Current Liability For Settlement Agreement               0.4      
Other Liability For Settlement Agreement               $ 0.4      
Perkin Elmer [Member]                      
Contingencies (Details) [Line Items]                      
Escrow Deposit                     $ 7.0
Litigation Settlement, Amount Awarded from Other Party     $ 7.0                
Affymetrix Inc [Member]                      
Contingencies (Details) [Line Items]                      
Payments for Legal Settlements       $ 6.8              
Agilent Technologies, Inc. [Member]                      
Contingencies (Details) [Line Items]                      
Payments for Legal Settlements     $ 6.1                
Life Technologies Corporation [Member]                      
Contingencies (Details) [Line Items]                      
Payments for Legal Settlements   $ 24.3                  
Illumina Inc [Member]                      
Contingencies (Details) [Line Items]                      
Payments for Legal Settlements $ 14.5                    
Clinical Labs [Member]                      
Contingencies (Details) [Line Items]                      
Percentage of Cost Incurred in Using Third Party Premises               18.00%      
Indemnification Agreement [Member]                      
Contingencies (Details) [Line Items]                      
Gain Contingency, Unrecorded Amount               $ 48.5