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Commitments and Contingencies (Litigation and Environmental - Narrative) (Details)
R$ in Millions
1 Months Ended 6 Months Ended
Sep. 30, 2010
BRL (R$)
Mar. 31, 2022
USD ($)
Mar. 31, 2022
BRL (R$)
site
Mar. 31, 2022
USD ($)
site
Sep. 30, 2021
USD ($)
Alleged Anticompete Litigation          
Loss Contingencies [Line Items]          
Civil fines imposed R$ 179.2 $ 38,000,000      
Provision for litigation   $ 0      
Maximum of loss contingency range subject to interest     R$ 179.2 $ 38,000,000  
Environmental          
Loss Contingencies [Line Items]          
Approximate number of sites on which settlement has not been reached | site     32 32  
Accrual for environmental loss contingencies       $ 74,100,000 $ 76,700,000
Accrual for environmental loss contingencies, maximum payout period   30 years      
Environmental | Minimum          
Loss Contingencies [Line Items]          
Estimate of possible exposure from environmental loss contingencies       73,000,000  
Environmental | Maximum          
Loss Contingencies [Line Items]          
Estimate of possible exposure from environmental loss contingencies       $ 87,000,000