Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Reconciliation of Beginning and Ending Balances for Plan Assets Valued using Significant Unobservable Inputs (Details)

v3.22.4
BENEFIT PLANS - Reconciliation of Beginning and Ending Balances for Plan Assets Valued using Significant Unobservable Inputs (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Private Equity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward]    
Beginning balance $ 16.1 $ 9.8
Return on plan assets:    
Unrealized 1.0 3.4
Realized (0.8) 2.2
Purchases 2.5 4.8
Sales (5.7) (4.1)
Ending balance 13.1 16.1
Hedge Funds    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward]    
Beginning balance 0.1 15.3
Return on plan assets:    
Unrealized (0.1) (2.1)
Realized 0.0 2.1
Purchases 0.0 0.0
Sales 0.0 (15.2)
Ending balance 0.0 0.1
Real Assets    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Roll Forward]    
Beginning balance 4.4 16.3
Return on plan assets:    
Unrealized 0.2 (0.6)
Realized 0.0 0.2
Purchases 0.2 0.1
Sales 0.0 (11.6)
Ending balance $ 4.8 $ 4.4