Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

v3.20.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Oct. 01, 2019
Sep. 30, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]      
Receivables from long-term manufacturing contracts $ 187.3   $ 181.1
Inventories, net 423.3   176.6
Deferred Income Tax Liabilities, Net 187.5   73.6
Retained earnings 496.4   599.5
Operating lease right-of-use assets 165.0   $ 0.0
Total present value of lease payments $ 162.5    
Retained Earnings [Member] | Accounting Standards Update 2018-02 [Member]      
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]      
Cumulative effect of new accounting principle   $ 6.0  
AOCI Attributable to Parent [Member] | Accounting Standards Update 2018-02 [Member]      
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]      
Cumulative effect of new accounting principle   $ 6.0