CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax, Attributable to Parent	[1]	$ 1.5	$ 1.3	$ 3.1	$ 2.7

[1] The tax expense included in pension and postretirement adjustments for the three and six months ended June 30, 2021 was $1.5 million and $3.1 million, respectively. The tax expense included in pension and postretirement adjustments for the three and six months ended June 30, 2020 was $1.3 million and $2.7 million, respectively.