XML 79 R68.htm IDEA: XBRL DOCUMENT v3.25.1
Accumulated Other Comprehensive Loss (Components Of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance $ (30.4) $ (33.6)    
Other Comprehensive Income (Loss) before reclassifications 1.1 (0.9)    
Amounts reclassified from accumulated other comprehensive income (loss) 0.1 0.7    
Net current-period other comprehensive income (loss) 1.2 (0.2)    
Ending Balance (29.2) (33.8)    
Gains and Losses on Securities        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss) before reclassifications 0.8 (0.6)    
Amounts reclassified from accumulated other comprehensive income (loss) 0.0 0.3    
Net current-period other comprehensive income (loss) 0.8 (0.3)    
AOCI Tax, Attributable to Parent (3.2) (7.6) $ (4.0) $ (7.3)
Gains and Losses on Cash Flow Hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Beginning balance (13.2) (12.8)    
Other Comprehensive Income (Loss) before reclassifications 0.0 (0.2)    
Amounts reclassified from accumulated other comprehensive income (loss) (0.1) 0.1    
Net current-period other comprehensive income (loss) (0.1) (0.1)    
Ending Balance (13.3) (12.9)    
Pension and OPEB Items        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other Comprehensive Income (Loss) before reclassifications 0.3 (0.1)    
Amounts reclassified from accumulated other comprehensive income (loss) 0.2 0.3    
Net current-period other comprehensive income (loss) 0.5 0.2    
AOCI Tax, Attributable to Parent $ (12.7) $ (13.3) $ (13.2) $ (13.5)