v3.25.2
DISCONTINUED OPERATIONS - Components of Income From Discontinued Operations (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Income from discontinued operations, net of taxes $ 0.0 $ 138.5 $ 0.0 $ 230.2
Discontinued Operations, Disposed of by Sale | ATC TIPL        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Revenue 0.0 355.6 0.0 677.1
Cost of operations 0.0 (172.6) 0.0 (342.0)
Depreciation, amortization and accretion 0.0 (41.1) 0.0 (81.7)
Selling, general, administrative and development expense 0.0 (16.0) 0.0 (28.7)
Other operating income (expense) 0.0 2.2 0.0 (1.0)
Operating income 0.0 128.1 0.0 223.7
Interest income 0.0 9.3 0.0 26.3
Interest expense 0.0 (2.7) 0.0 (5.6)
Other income, net 0.0 46.4 0.0 46.3
Income from discontinued operations before taxes 0.0 181.1 0.0 290.7
Income tax provision 0.0 (42.6) 0.0 (60.5)
Income from discontinued operations, net of taxes $ 0.0 $ 138.5 $ 0.0 $ 230.2