Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Deferred tax assets: | ||||
| Net operating loss and tax credit carryforwards | $ 1,094.9 | $ 1,282.9 | ||
| Disallowed business interest expense carryforward | 113.5 | 79.3 | ||
| Property, plant and equipment | 1.9 | |||
| Other | 10.1 | |||
| Deferred tax assets before valuation allowance | 1,220.4 | 1,362.2 | ||
| Valuation allowance | (5.9) | (7.1) | ||
| Deferred tax assets | 1,214.5 | 1,355.1 | ||
| Deferred tax liabilities: | ||||
| Investments | [1] | (2,086.6) | (1,867.9) | |
| Property, plant, and equipment | (3.0) | |||
| Other | (20.0) | |||
| Deferred tax liabilities | (2,086.6) | (1,890.9) | ||
| Net deferred tax asset (liability) | (872.1) | (535.8) | ||
| Net deferred tax asset (liability) | ||||
| Federal | (826.7) | (507.0) | ||
| State | (45.4) | (28.8) | ||
| Net deferred tax asset (liability) | $ (872.1) | $ (535.8) | ||
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- Definition Net deferred tax liability [Abstract] No definition available.
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- Definition Deferred tax assets operating loss and tax credit carryforwards. No definition available.
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- Definition For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date related to federal income taxes, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. No definition available.
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- Definition For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date related to state income taxes, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. No definition available.
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- References No definition available.
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- References No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible interest carryforward. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from investments in unconsolidated subsidiaries and investments in other affiliates which are not controlled nor consolidated. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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