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Annual report pursuant to Section 13 and 15(d)

PENSION AND OTHER POSTRETIREMENT BENEFITS (Estimated Future Benefit Payments) (Details)

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PENSION AND OTHER POSTRETIREMENT BENEFITS (Estimated Future Benefit Payments) (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Pension Plan [Member] Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý
2020 $ 73.6
2021 71.1
2022 70.4
2023 71.2
2024 66.9
2025 318.2
Other Postretirement Benefits Plan [Member] Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý
2020 16.5
Medicare Subsidy - 2020 (0.7)
2021 15.8
Medicare Subsidy - 2021 (0.8)
2022 15.5
Medicare Subsidy - 2022 (0.8)
2023 15.5
Medicare Subsidy - 2023 (0.8)
2024 15.2
Medicare Subsidy - 2024 (0.9)
2025 72.7
Medicare Subsidy - 2025 (4.6)
Gross Company Benefits [Member] | Other Postretirement Benefits Plan [Member] Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý
2020 17.2
2021 16.6
2022 16.3
2023 16.3
2024 16.1
2025 $ 77.3