Segment Reporting - Schedule of Reconciliation of Adjusted EBITDA (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Segment Reporting [Abstract] | ||||
| Adjusted EBITDA | $ 348.0 | $ 318.6 | $ 696.8 | $ 632.2 |
| Stock-based compensation | (13.8) | (14.3) | (25.3) | (23.8) |
| Depreciation and amortization | (90.4) | (79.9) | (177.7) | (159.1) |
| Loss on disposal or impairment of assets | (2.1) | (0.3) | (2.4) | (0.5) |
| Loss on early extinguishment of debt | (3.2) | 0.0 | (3.4) | 0.0 |
| Interest expense and amortization of debt discounts and fees | (32.8) | (30.4) | (64.6) | (62.2) |
| Net income attributable to noncontrolling interests | 53.5 | 42.8 | 107.2 | 87.8 |
| Change in fair market value of marketable securities | 2.4 | 0.3 | 2.2 | 1.0 |
| Gain on sale of Gamma Knife | 0.0 | 0.0 | 17.5 | 0.0 |
| Income from continuing operations before income tax expense | $ 261.6 | $ 236.8 | $ 550.3 | $ 475.4 |
| X | ||||||||||
- Definition Adjusted earnings before interest, taxes, depreciation, and amortization as defined in the Company's credit agreement. No definition available.
|
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of an equity method investment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the noncontrolling interest. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of interest expense classified as nonoperating. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|