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Stockholders' Equity Preferred Stock (Details) - EIDP - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Class of Stock [Line Items]                  
Preferred Stock, Shares Authorized 23,000,000     23,000,000     23,000,000 23,000,000 23,000,000
$4.50 Series Preferred Stock [Member]                  
Class of Stock [Line Items]                  
Preferred Stock, Shares Issued 1,673,000     1,673,000     1,673,000 1,673,000 1,673,000
Preferred Stock, Redemption Amount $ 120     $ 120     $ 120 $ 120 $ 120
Preferred Stock, Dividend Rate, Per-Dollar-Amount $ 4.50 $ 4.50 $ 4.50 $ 4.50 $ 4.50 $ 4.50 $ 4.50 $ 4.50 $ 4.50
$3.50 Series Preferred Stock [Member]                  
Class of Stock [Line Items]                  
Preferred Stock, Shares Issued 700,000     700,000     700,000 700,000 700,000
Preferred Stock, Redemption Amount $ 102     $ 102     $ 102 $ 102 $ 102
Preferred Stock, Dividend Rate, Per-Dollar-Amount $ 3.50 $ 3.50 $ 3.50 $ 3.50 $ 3.50 $ 3.50 $ 3.50 $ 3.50 $ 3.50
Corteva [Member]                  
Class of Stock [Line Items]                  
Ownership of outstanding common shares in EIDP             100.00%