Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Revenue Recognition (Details)

v3.19.3
Summary of Significant Accounting Policies Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Oct. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Net revenue $ 485.8 $ 446.6 $ 464.6 $ 410.3 $ 474.7 $ 446.0 $ 452.2 $ 397.2 $ 1,807.3 $ 1,770.1 $ 1,590.2  
Retained earnings 599.5       531.0       599.5 531.0   $ 531.2
Receivables from long-term manufacturing contracts 181.1       120.3       181.1 120.3   122.2
Inventories 176.6       172.5       176.6 172.5   170.9
Deferred income taxes 73.6       76.4       73.6 76.4   76.5
Cost of Goods and Services Sold                 1,184.3 1,128.0 999.4  
Gross profit 166.7 $ 148.4 $ 160.9 $ 147.0 163.8 $ 163.5 $ 168.6 $ 146.2 623.0 642.1 590.8  
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest                 176.7 146.5 188.3  
Consolidated net income                 126.2 81.2 $ 128.4  
Calculated under Revenue Guidance in Effect before Topic 606 [Member]                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Net revenue                 1,807.3      
Retained earnings 599.3       531.0       599.3 531.0    
Receivables from long-term manufacturing contracts 179.2       120.3       179.2 120.3    
Inventories 178.3       172.5       178.3 172.5    
Deferred income taxes 73.6       $ 76.4       73.6 $ 76.4    
Cost of Goods and Services Sold                 1,184.3      
Gross profit                 623.0      
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest                 176.7      
Consolidated net income                 126.2      
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]                        
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]                        
Net revenue                 0.0      
Retained earnings (0.2)               (0.2)     0.2
Receivables from long-term manufacturing contracts (1.9)               (1.9)     1.9
Inventories 1.7               1.7     (1.6)
Deferred income taxes $ 0.0               0.0     $ 0.1
Cost of Goods and Services Sold                 0.0      
Gross profit                 0.0      
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest                 0.0      
Consolidated net income                 $ 0.0