Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Pension Plans, Defined Benefit [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Defined Benefit Pension Contributions $ 5.6 $ 18.3 $ 12.3 $ 23.9
Other Postretirement Benefit Plans, Defined Benefit [Member]        
Defined Benefit Plan Disclosure [Line Items]        
OPEB Contributions $ 0.0 $ 0.0 $ 0.0 $ 0.0