Quarterly report pursuant to Section 13 or 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)

v3.20.1
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax $ (315.7) $ (281.1)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax 0.0  
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax (3.1) (2.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax (318.8) (283.9)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax (310.1) (275.4)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax (0.9)  
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax (6.1) (0.1)
Accumulated Other Comprehensive Income (Loss), Net of Tax (317.1) (275.5)
Changes in Pension and Other Post-Retirement Benefits, net of tax [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss) before reclassifications 0.0 0.2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 5.6 5.5
Unrealized Net Gain (Loss) on Foreign Currency Translation [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss) before reclassifications (0.9)  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0.0  
Net Unrealized Gain (Loss) on Derivative Financial Instruments, net of tax [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss) before reclassifications (5.2) 2.5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 2.2 0.2
Accumulated Other Comprehensive Income (Loss) [Member]    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Other comprehensive income (loss) before reclassifications (6.1) 2.7
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ 7.8 $ 5.7