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Basis of Presentation (Details)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2018
USD ($)
Segment
Dec. 30, 2017
Segment
Apr. 01, 2017
USD ($)
Sep. 30, 2017
Segment
Oct. 01, 2017
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]          
Number of operating segments | Segment 2 2   3  
Accounting Standards Update 2016-09 [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Windfall Tax Deductions Not Yet Recognized         $ 37.0
Windfall Tax Deductions Not Yet Recognized Offset Valuation Allowance         36.9
Excess Tax Benefit from Share-based Compensation, Operating Activities     $ 0.1    
Excess tax benefits realized from stock-based awards     $ 0.1    
forfeiture adjustment         $ 0.7
Accounting Standards Update 2016-16 [Member]          
New Accounting Pronouncements or Change in Accounting Principle [Line Items]          
Deferred Tax Assets, Other $ 77.0