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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The carrying amounts and estimated fair values of our financial instruments are as follows:
September 30, 2025December 31, 2024
Carrying AmountFair ValueCarrying AmountFair Value
Cash and cash equivalents$153.3 $153.3 $272.8 $272.8 
Accounts receivable1,060.4 1,060.4 1,113.3 1,113.3 
Equity securities1,894.5 1,894.5 1,486.8 1,486.8 
Accounts payable1,215.0 1,215.0 1,156.5 1,156.5 
Structured accounts payable arrangements402.5 402.5 402.3 402.3 
Short-term debt1,153.7 1,153.7 847.1 847.1 
Long-term debt, including current portion3,414.6 3,437.5 3,377.6 3,324.1