v3.8.0.1
Contingencies - Narrative (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2018
USD ($)
Dec. 30, 2017
USD ($)
Apr. 01, 2017
USD ($)
Dec. 30, 2017
government_inquiry
Commitments and Contingencies Disclosure [Abstract]        
Demand for payments     $ 1.5  
Loss contingency, damages paid, value $ 0.5      
Loss contingency, loss in period   $ 4.9    
Number of government inquiries | government_inquiry       2