Quarterly report pursuant to Section 13 or 15(d)

ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in AOCI (loss) related to shareholders' equity (Details)

v3.20.2
ACCUMULATED OTHER COMPREHENSIVE LOSS - Changes in AOCI (loss) related to shareholders' equity (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax, Beginning Balance $ (304.1) $ (310.1) $ (315.7) $ (269.6) $ (275.4) $ (281.1) $ (315.7) $ (281.1)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance (0.2) (0.9) 0.0       0.0  
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Beginning Balance (1.6) (6.1) (3.1) (2.2) (0.1) (2.8) (3.1) (2.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance (305.9) (317.1) (318.8) (271.8) (275.5) (283.9) (318.8) (283.9)
Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax, Ending Balance (297.5) (304.1) (310.1) (263.8) (269.6) (275.4) (297.5) (263.8)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance 1.4 (0.2) (0.9)       1.4  
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Ending Balance 14.1 (1.6) (6.1) (1.8) (2.2) (0.1) 14.1 (1.8)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance (282.0) (305.9) (317.1) (265.6) (271.8) (275.5) $ (282.0) $ (265.6)
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 0.4 0.4 0.0 0.3 0.3 0.2    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 6.2 5.6 5.6 5.5 5.5 5.5    
Unrealized Net Gain (Loss) on Foreign Currency Translation [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Other comprehensive income (loss) before reclassifications 1.6 0.7 (0.9)          
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0.0 0.0 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 12.2 1.4 (5.2) (0.5) (2.3) 2.5    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 3.5 3.1 2.2 0.9 0.2 0.2    
Accumulated Other Comprehensive Income (Loss) [Member]                
Accumulated Other Comprehensive Income (Loss) [Line Items]                
Other comprehensive income (loss) before reclassifications 14.2 2.5 (6.1) (0.2) (2.0) 2.7    
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax $ 9.7 $ 8.7 $ 7.8 $ 6.4 $ 5.7 $ 5.7