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v3.25.2

Business and Asset Actions - Project Exit Costs (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2025 | Mar. 31, 2025 | Jun. 30, 2025 | Sep. 30, 2024
Restructuring Cost and Reserve [Line Items] |  |  |  |
Plant and equipment, net | $ 25,640.0 |  | $ 25,640.0 | $ 23,370.9
Project Exit Costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Project exit costs |  |  | 2,885.9 |
Noncash expenses |  |  | (2,468.2) |
Cash payments |  |  | (100.4) |
Currency translation adjustment |  |  | 8.5 |
Accrual for unpaid benefits reflected in "Payables and Accrued Liabilities" | 325.8 |  | 325.8 |
Estimated effect on cash flows, total | 425.0 |  |  |
Project Exit Costs | Fair Value, Nonrecurring |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Plant and equipment, net | 22.5 | $ 22.5 | 22.5 |
Operating Income (Loss) | Project Exit Costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Project exit costs | $ 24.1 | $ 2,861.8 | 2,885.9 |
Income (Loss) from Equity Method Investments | Project Exit Costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Project exit costs |  |  | $ 6.8 |

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