Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Components Of Net Periodic Benefit Cost) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Components Of Net Periodic Benefit Cost) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 17.3 $ 18.7 $ 17.1
Interest cost 34.9 30.3 30.5
Expected return on plan assets (54.6) (60.0) (54.5)
Amortization:      
Amortization of prior service cost (credit) 1.2 2.2 2.6
Net actuarial loss 23.5 21.2 22.3
Curtailments 0.1 0.3 0.0
Net periodic benefit cost (credit) 22.4 12.7 18.0
Other Postretirement Benefits Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 1.7 2.2 1.8
Interest cost 9.5 8.3 8.3
Expected return on plan assets (16.8) (18.4) (17.7)
Amortization:      
Amortization of prior service cost (credit) (2.0) (3.0) (3.0)
Net actuarial loss 5.1 5.0 4.5
Curtailments 0.0 0.0 0.0
Net periodic benefit cost (credit) $ (2.5) $ (5.9) $ (6.1)