LEASES - Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
Sep. 30, 2024 |
Jun. 30, 2024 |
|---|---|---|---|---|
| Assets | ||||
| Operating lease ROU assets | $ 700.4 | $ 673.2 | $ 646.9 | |
| Accumulated amortization | (154.3) | (146.8) | (135.1) | |
| Operating leases, net | 546.1 | 526.4 | 511.8 | |
| Finance lease ROU assets | 52.2 | 54.7 | 59.0 | |
| Accumulated depreciation | $ (25.8) | $ (24.3) | $ (22.2) | |
| Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] | Property, Plant and Equipment, Net | Property, Plant and Equipment, Net | Property, Plant and Equipment, Net | |
| Finance leases, net | $ 26.4 | $ 30.4 | $ 36.8 | |
| Total lease assets | $ 572.5 | $ 556.8 | $ 548.6 | |
| Current | ||||
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other current liabilities | Other current liabilities | Other current liabilities | |
| Operating | $ 51.0 | $ 49.3 | $ 47.9 | |
| Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Other current liabilities | Other current liabilities | Other current liabilities | |
| Finance | $ 9.2 | $ 10.7 | $ 11.7 | |
| Noncurrent | ||||
| Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Noncurrent operating lease liabilities | Noncurrent operating lease liabilities | Noncurrent operating lease liabilities | |
| Noncurrent operating lease liabilities | $ 536.1 | $ 521.4 | $ 507.5 | |
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other noncurrent liabilities | Other noncurrent liabilities | Other noncurrent liabilities | |
| Finance | $ 5.7 | $ 9.7 | $ 13.6 | |
| Total lease liabilities | $ 602.0 | $ 591.1 | $ 580.7 | |
| Weighted-average remaining lease term (years) | ||||
| Operating leases | 18 years 9 months 18 days | 18 years 10 months 24 days | 19 years 2 months 12 days | |
| Finance leases | 2 years | 2 years 2 months 12 days | 2 years 4 months 24 days | |
| Weighted-average discount rate | ||||
| Operating leases | 4.70% | 4.50% | 4.40% | |
| Finance leases | 3.50% | 3.20% | 2.90% |