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PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY PREFERRED STOCK AND COMMON SHAREHOLDERS' EQUITY - Accumulated Other Comprehensive Earnings (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax $ (108.1) $ (69.0) $ (38.4) $ (195.0) $ (108.1) $ (38.4)
Other comprehensive income before reclassifications (39.1) (36.0) 156.6 69.7    
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax 0.0 0.0 0.0 0.0    
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax 6.2 5.8 3.8 3.4 6.2 3.8
Accumulated other comprehensive loss (101.9) (63.2) (34.6) (191.6) (101.9) (34.6)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax 0.5 0.5 0.5 0.4    
Other Comprehensive Income (Loss), before Reclassifications, before Tax (38.6) (35.5) 157.1 70.1    
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax 0.1 0.1 0.1 0.1    
Tax effect of adjustments 0.1 0.1 0.1 0.1 0.2 0.2
Accumulated Other Comprehensive Earnings [Roll Forward]            
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance (69.0) (33.0) (195.0) (264.7) (33.0) (264.7)
Other comprehensive income before reclassifications (39.1) (36.0) 156.6 69.7    
Tax effect of adjustments 0.0 0.0 0.0 0.0    
Foreign Currency Translation Adjustments, Ending balance (108.1) (69.0) (38.4) (195.0) (108.1) (38.4)
Net Benefit Plan Adjustments, Beginning balance 5.8 5.4 3.4 3.1 5.4 3.1
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax 0.5 0.5 0.5 0.4    
Tax effect of adjustments (0.1) (0.1) (0.1) (0.1)    
Net Benefit Plan Adjustments, Ending balance 6.2 5.8 3.8 3.4 6.2 3.8
Accumulated Other Comprehensive Earnings, Beginning balance (63.2) (27.6) (191.6) (261.6) (27.6) (261.6)
Other Comprehensive Income (Loss), before Reclassifications, before Tax (38.6) (35.5) 157.1 70.1    
Provision for income tax related to items of comprehensive earnings (0.1) (0.1) (0.1) (0.1) (0.2) (0.2)
Accumulated Other Comprehensive Earnings, Ending balance $ (101.9) $ (63.2) $ (34.6) $ (191.6) $ (101.9) $ (34.6)