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Financing Agreements - Narrative (Details) - USD ($)
 3 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Sep. 30, 2025
Debt Instrument [Line Items]      
Current borrowing capacity $ 34,500,000    
L/G Facility Agreement Amendment      
Debt Instrument [Line Items]      
Debt Issuance Costs, Line of Credit Arrangements, Gross $ 1,200,000    
$175 term loan | Debt Instrument, Tranche One      
Debt Instrument [Line Items]      
Weighted-average interest rates 5.85%    
185 Euro Term Loan | Debt Instrument, Tranche One      
Debt Instrument [Line Items]      
Weighted-average interest rates 3.74%    
$1,000 revolving credit facility (excluding outstanding letters of credit)      
Debt Instrument [Line Items]      
Letters of credit outstanding, amount $ 15,800,000    
Line of credit facility, remaining borrowing capacity $ 400,700,000    
Weighted average facility fee 0.24% 0.24%  
$1,000 revolving credit facility (excluding outstanding letters of credit) | Debt Instrument, Tranche One      
Debt Instrument [Line Items]      
Weighted-average interest rates 3.52%    
$1,000 revolving credit facility (excluding outstanding letters of credit) | Debt Instrument, Tranche Two      
Debt Instrument [Line Items]      
Weighted-average interest rates 4.96%    
$350 senior unsecured notes (2)      
Debt Instrument [Line Items]      
Debt Issuance Costs, Line of Credit Arrangements, Gross $ 2,200,000   $ 2,300,000
Other Financing Agreements      
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity 668,000,000.0   666.1
Line of credit facility, amount utilized for bank guarantees 363,300,000   374.3
$500 senior unsecured notes (1)      
Debt Instrument [Line Items]      
Debt Issuance Costs, Line of Credit Arrangements, Gross $ 3,800,000   $ 4,200,000