Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Short-term borrowings | ||
| Commercial paper issuances | $ 49.9 | $ 0.0 |
| Total short-term borrowings | 49.9 | 0.0 |
| Long-term debt | ||
| Debt issuance costs, net | (15.4) | (16.4) |
| Total long-term debt | 2,206.3 | 2,205.1 |
| Net long-term debt | 2,206.3 | 2,205.1 |
| 3.15% Senior notes due August 1, 2027 | ||
| Long-term debt | ||
| Senior notes | 425.0 | 425.0 |
| Less: Discount | 0.0 | (0.1) |
| 2.3% Senior notes due December 15, 2031 | ||
| Long-term debt | ||
| Senior notes | 400.0 | 400.0 |
| Less: Discount | (0.5) | (0.5) |
| 5.6% Senior notes due November 15, 2032 | ||
| Long-term debt | ||
| Senior notes | 500.0 | 500.0 |
| Less: Discount | (0.6) | (0.7) |
| 3.95% Senior notes due August 1, 2047 | ||
| Long-term debt | ||
| Senior notes | 400.0 | 400.0 |
| Less: Discount | (2.1) | (2.1) |
| 5.00% Senior notes due June 15, 2052 | ||
| Long-term debt | ||
| Senior notes | 500.0 | 500.0 |
| Less: Discount | $ (0.1) | $ (0.1) |
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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, after accumulated amortization, of debt discount. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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- References No definition available.
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. No definition available.
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