Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Other (Details)

v3.19.3
Summary of Significant Accounting Policies - Other (Details) - USD ($)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
FederalCorporateTaxRate               21.00% 35.00%
BlendedCorporateTaxRate       24.50%     24.50%    
Treasury Stock                  
Maximum amount of common stock repurchases $ 200,000,000.0                
Remaining amount of share repurchases $ 200,000,000.0                
Shares Repurchased and Classified as Treasury Stock (shares)   1,385,600              
Shares repurchased (in dollars)   $ 61,000,000.0 $ 28,000,000.0            
Shares issued from treasury stock under various stock compensation programs (in shares) 400,000 500,000              
Preferred stock                  
Authorized shares of preferred stock (in shares) 1,000,000                
Preferred stock par value (in dollars per share) $ 0         $ 0      
Shares issued 0 0              
Accumulated other comprehensive loss                  
Currency translation $ (64,700,000)       $ (44,100,000)        
Pension and postretirement (net of taxes of $30.0 and $22.3) (62,300,000)       (41,000,000.0)        
Unrealized (loss) gain on derivative instruments (net of taxes of $0.7 and $0.3) (13,600,000)       900,000        
Accumulated other comprehensive loss (140,600,000)       (84,200,000)        
Pension and postretirement, taxes 22,300,000       23,400,000        
Unrealized gain (loss) on derivative instruments, taxes 300,000       800,000        
Revenue recognition                  
Revenue from long-term manufacturing contracts as a percentage of total revenue     25.00%            
Research and Development Costs                  
Research and development costs 10,600,000 $ 11,700,000 $ 11,900,000            
Warranty costs                  
Warranty reserves 17,100,000       16,900,000        
Warranty costs 3,400,000 3,300,000 4,100,000            
Recently Adopted Accounting Standards                  
Income tax expense $ 50,500,000 65,300,000 59,900,000            
Minimum                  
Warranty costs                  
Standard Product Warranty Period 1 year                
Maximum                  
Length of Time Hedged in Currency Exchange Rates 24 months                
Self-Insurance                  
Deductibles and self-insured retentions per occurrence $ 500,000                
Warranty costs                  
Standard Product Warranty Period 2 years                
Business acquisitions and related business acquisition and transition costs                  
Measurement period over which initial purchase price allocations are subject to revision 1 year                
Previously Reported [Member]                  
Treasury Stock                  
Remaining amount of share repurchases         $ 39.6        
Accounting Standards Update 2016-02 [Member] | Minimum                  
Operating Lease, Liability $ 120,000,000.0                
Accounting Standards Update 2016-02 [Member] | Maximum                  
Operating Lease, Liability $ 140,000,000.0                
Cost of Goods, Total [Member] | Accounting Standards Update 2017-07 [Member]                  
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification   $ 800,000 500,000            
Operating expenses | Accounting Standards Update 2017-07 [Member]                  
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification     $ 900,000