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Business Segment, Geographic and Concentration Risk Information (Narrative) (Details)
$ in Millions
1 Months Ended 12 Months Ended
Feb. 29, 2016
Jan. 01, 2016
USD ($)
Segment
Jan. 02, 2015
Noncontrolling Interest [Line Items]      
Number of Reportable Segments | Segment   3  
QiG [Member]      
Noncontrolling Interest [Line Items]      
Controlling Interest, Ownership Percentage   100.00% 89.00%
Controlling Interest, Liability of Expenses Incurred, Percentage   100.00%  
Consideration to acquire additional noncontrolling interest   $ 16.7  
Noncontrolling Interest, Consideration Paid to Related Party   6.9  
Greatbatch Medical [Member]      
Noncontrolling Interest [Line Items]      
Intersegment sales   1.8  
Lake Region Medical [Member]      
Noncontrolling Interest [Line Items]      
Intersegment sales   1.2  
Accrued Expenses [Member] | QiG [Member]      
Noncontrolling Interest [Line Items]      
Consideration to acquire additional noncontrolling interest payable   $ 6.8  
Subsequent Event [Member]      
Noncontrolling Interest [Line Items]      
Stock conversion ratio 3