Lines of Credit and Financing Arrangements (Outstanding Debt Obligations) (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Debt Instrument [Line Items] | ||
| Commercial paper | $ 455.1 | $ 226.0 |
| Current maturities of long-term debt: | ||
| Finance lease obligations | 19.6 | 18.3 |
| Debt issuance costs | 0.4 | 0.0 |
| Total current maturities of long-term debt | 319.2 | 18.3 |
| Long-Term Debt: | ||
| Finance lease obligations | 51.5 | 50.6 |
| Debt issuance costs | (4.4) | (6.5) |
| Total long-term debt | 847.1 | 1,144.1 |
| Total debt | 1,621.4 | 1,388.4 |
| Senior Unsecured Notes | ||
| Current maturities of long-term debt: | ||
| Senior unsecured notes | 300.0 | 0.0 |
| Long-Term Debt: | ||
| Domestic credit facility and senior unsecured notes | 500.0 | 800.0 |
| Domestic Credit Facility | ||
| Long-Term Debt: | ||
| Domestic credit facility and senior unsecured notes | $ 300.0 | $ 300.0 |
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- Definition Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of short-term and long-term debt and lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before accumulated amortization, of debt issuance costs classified as current. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of long-term debt and lease obligation, classified as noncurrent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of long-term debt and lease obligation, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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