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v3.25.4

Long-Term Debt (Interest Rates And Due Dates) (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2025 | Jul. 31, 2025 | Dec. 31, 2024
Debt Instrument [Line Items] |  |  |
Finance leases | $ 3,900,000 |  | $ 3,700,000
Unamortized discounts and deferred loan costs | (10,000,000.0) |  | (11,700,000)
Total debt | 1,497,700,000 |  | 1,864,100,000
Less: current maturities | 1,500,000 |  | 1,300,000
Total long-term debt | $ 1,496,200,000 |  | $ 1,862,800,000
Long-term debt, term | 180 days |  |
Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Redemption price (as a percent) | 100.00% |  |
Long-term debt, term | 90 days |  |
Redemption price, if change of control repurchase event occurs (as a percent) | 101.00% |  |
Limitation on secured debt (as a percent) | 15.00% |  |
Industrial development bonds - variable interest rates |  |  |
Debt Instrument [Line Items] |  |  |
Year-end Interest Rate | 4.60% |  | 5.00%
Short term and long term debt | $ 3,800,000 |  | $ 3,800,000
Commercial paper |  |  |
Debt Instrument [Line Items] |  |  |
Year-end Interest Rate | 0.00% |  | 5.10%
Short term and long term debt | $ 0 |  | $ 368,000,000.0
Other, partially secured |  |  |
Debt Instrument [Line Items] |  |  |
Short term and long term debt | $ 0 |  | $ 300,000
Net commercial paper |  |  |
Debt Instrument [Line Items] |  |  |
Weighted average interest rate (as a percent) | 5.00% |  | 5.60%
Line of Credit | Revolving credit facility |  |  |
Debt Instrument [Line Items] |  |  |
Maximum borrowing capacity | $ 1,000,000,000 | $ 1,200,000,000 | $ 1,200,000,000
Senior Notes, Due 2027 | Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Year-end Interest Rate | 3.50% |  | 3.50%
Short term and long term debt | $ 500,000,000.0 |  | $ 500,000,000.0
Senior Notes, Due 2029 | Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Year-end Interest Rate | 4.40% |  | 4.40%
Short term and long term debt | $ 500,000,000.0 |  | $ 500,000,000.0
Senior Notes, Due 2051 | Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Year-end Interest Rate | 3.50% |  | 3.50%
Short term and long term debt | $ 500,000,000.0 |  | $ 500,000,000.0

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