Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details)

v3.19.1
Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
Mar. 31, 2019
Oct. 01, 2018
Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]      
Receivables from long-term manufacturing contracts $ 164.8 $ 122.2 $ 120.3
Inventories 183.0 170.9 172.5
Deferred Income Tax Liabilities, Net 79.4   76.4
Deferred income taxes 79.4 76.5 76.4
Retained earnings 571.1 531.2 531.0
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]      
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]      
Receivables from long-term manufacturing contracts (3.0) 1.9  
Inventories 2.7 (1.6)  
Deferred Income Tax Liabilities, Net (0.1)    
Deferred income taxes   0.1  
Retained earnings (0.2) $ 0.2  
Calculated under Revenue Guidance in Effect before Topic 606 [Member]      
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]      
Receivables from long-term manufacturing contracts 161.8   120.3
Inventories 185.7   172.5
Deferred Income Tax Liabilities, Net 79.3    
Deferred income taxes     76.4
Retained earnings $ 570.9   $ 531.0