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Annual report pursuant to Section 13 and 15(d)

PENSIONS AND POSTRETIREMENT BENEFITS (Fair Value Measurements Using Significant Unobservable Inputs (Level 3) on Changes in Pension Plan Assets) (Details)

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PENSIONS AND POSTRETIREMENT BENEFITS (Fair Value Measurements Using Significant Unobservable Inputs (Level 3) on Changes in Pension Plan Assets) (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Ìý Ìý
Fair value of plan assets — beginning of year $ 229.1 $ 215.6
Actual return on plan assets: Ìý Ìý
Relating to assets still held at the reporting date (1.3) 12.5
Relating to assets sold during the period 30.6 4.0
Purchases 16.5 5.2
Sales (59.9) (8.2)
Other (2.6) Ìý
Fair value of plan assets — end of year 212.4 229.1
Hedge Funds [Member] Ìý Ìý
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Ìý Ìý
Fair value of plan assets — beginning of year 37.2 37.4
Actual return on plan assets: Ìý Ìý
Relating to assets still held at the reporting date 3.4 (0.2)
Relating to assets sold during the period 0.0 0.0
Purchases 0.0 0.0
Sales 0.0 0.0
Other (0.4) Ìý
Fair value of plan assets — end of year 40.2 37.2
Private Equity Funds [Member] Ìý Ìý
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Ìý Ìý
Fair value of plan assets — beginning of year 42.6 39.8
Actual return on plan assets: Ìý Ìý
Relating to assets still held at the reporting date (1.0) 1.4
Relating to assets sold during the period 1.2 4.0
Purchases 16.5 5.2
Sales (9.3) (7.8)
Other (0.5) Ìý
Fair value of plan assets — end of year 49.5 42.6
Structured Finance [Member] Ìý Ìý
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Ìý Ìý
Fair value of plan assets — beginning of year 78.8 72.9
Actual return on plan assets: Ìý Ìý
Relating to assets still held at the reporting date 0.5 5.9
Relating to assets sold during the period 0.8 0.0
Purchases 0.0 0.0
Sales (26.8) 0.0
Other (1.0) Ìý
Fair value of plan assets — end of year 52.3 78.8
Real Estate [Member] Ìý Ìý
Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] Ìý Ìý
Fair value of plan assets — beginning of year 70.5 65.5
Actual return on plan assets: Ìý Ìý
Relating to assets still held at the reporting date (4.2) 5.4
Relating to assets sold during the period 28.6 0.0
Purchases 0.0 0.0
Sales (23.8) (0.4)
Other (0.7) Ìý
Fair value of plan assets — end of year $ 70.4 $ 70.5