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Stockholders' Equity Preferred Stock (Details) - EIDP - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
$4.50 Series Preferred Stock [Member]      
Class of Stock [Line Items]      
Preferred Stock, Shares Authorized 23,000,000 23,000,000 23,000,000
Preferred Stock, Shares Issued 1,673,000 1,673,000 1,673,000
Preferred Stock, Redemption Amount $ 120 $ 120 $ 120
Preferred Stock, Dividend Rate, Per-Dollar-Amount $ 4.50 $ 4.50 $ 4.50
$3.50 Series Preferred Stock [Member]      
Class of Stock [Line Items]      
Preferred Stock, Shares Authorized 23,000,000 23,000,000 23,000,000
Preferred Stock, Shares Issued 700,000 700,000 700,000
Preferred Stock, Redemption Amount $ 102 $ 102 $ 102
Preferred Stock, Dividend Rate, Per-Dollar-Amount $ 3.50 $ 3.50 $ 3.50
Corteva [Member]      
Class of Stock [Line Items]      
Ownership of outstanding common shares in EIDP 100.00%