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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (Parentheticals) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]      
Postretirement plans (net of $0.0 tax provisions in each period) $ 0.0 $ 0.0 $ 0.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax $ (0.0) $ (0.0) $ (0.0)