v3.26.3
Fair Value Measurements (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Reported Value Measurement          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Cash and cash equivalents $ 272.6   $ 272.6   $ 276.6
Accounts receivable 1,013.6   1,013.6   1,078.6
Equity securities 1,793.1   1,793.1   1,804.2
Accounts payable 871.3   871.3   1,171.9
Structured accounts payable arrangements 402.4   402.4   480.1
Short-term debt 511.6   511.6   759.9
Long-term debt, including current portion 5,401.5   5,401.5   4,294.0
Gross asset position 0.9   0.9   3.3
Gross liability position 0.7   0.7   2.7
Cash and cash equivalents 272.6   272.6   276.6
Accounts receivable 1,013.6   1,013.6   1,078.6
Equity securities 1,793.1   1,793.1   1,804.2
Accounts payable 871.3   871.3   1,171.9
Structured accounts payable arrangements 402.4   402.4   480.1
Short-term debt 511.6   $ 511.6   759.9
Fair Value, Recurring | Foreign currency derivatives          
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]          
Average maturity of foreign currency derivative instruments     18 months    
Gross asset position 0.9   $ 0.9   3.3
Gross liability position 0.7   0.7   2.3
Fair Value, Recurring | Commodity derivatives          
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]          
Gross asset position 0.0   0.0   0.0
Gross liability position 0.0   0.0   0.4
Estimate of Fair Value Measurement          
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]          
Long-term debt, including current portion 5,191.0   5,191.0   $ 4,311.0
Ma'aden          
Debt and Equity Securities, FV-NI [Line Items]          
Equity Securities, FV-NI, Unrealized Gain (Loss) $ 38.0 $ 308.0 $ (11.1) $ 407.7