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Capitalization (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
May 03, 2022
Mar. 31, 2022
Sep. 30, 2021
Debt Instrument [Line Items]      
Common stock shares issued due to SARs exercises   25,251  
Shares tendered   149,499  
Current Portion of Long-Term Debt   $ 549,000 $ 0
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Line of Credit Facility, Maximum Borrowing Capacity   1,000,000  
3.75% Notes Due March 2023 [Member]      
Debt Instrument [Line Items]      
Current Portion of Long-Term Debt   $ 500,000  
Long-term debt, interest rate   3.75%  
7.395% Notes Due March 2023 [Member]      
Debt Instrument [Line Items]      
Current Portion of Long-Term Debt   $ 49,000  
Long-term debt, interest rate   7.395%  
Subsequent Event [Member]      
Debt Instrument [Line Items]      
Debt to Capitalization Ratio Maximum Excluded Unrealized Gains or Losses on Other Derivative Financial Instruments in AOCI $ 10,000    
Restricted Stock Units [Member]      
Debt Instrument [Line Items]      
Common stock issued   110,839  
Performance Shares [Member]      
Debt Instrument [Line Items]      
Common stock issued   265,607  
Board Of Directors [Member]      
Debt Instrument [Line Items]      
Common stock issued   15,479