CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parentheticals) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax	[1]	$ 1.7	$ 1.3

[1] The tax expense included in pension and postretirement adjustments for the three months ended March 31, 2021 and 2020 was $1.7 million and $1.3 million, respectively.