Accumulated Other Comprehensive Loss (Tables)

12 Months Ended

Dec. 31, 2020

Equity [Abstract]

Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]

Accumulated other comprehensive loss at the balance sheet dates is comprised of the following:

(In millions)	Pension Plan Adjustments		Other Post Retirement Employee Benefit Plan Adjustments		Total
Balance at December 31, 2018	$	(83.0)	$	15.7	$	(67.3)
Other comprehensive income (loss) before reclassifications	9.8		(7.1)		2.7
Amounts reclassified from accumulated other comprehensive loss	5.4		(0.3)		5.1
Other comprehensive income (loss), net of tax	15.2		(7.4)		7.8
Balance at December 31, 2019	(67.8)		8.3		(59.5)
Other comprehensive income (loss) before reclassifications	6.0		(8.1)		(2.1)
Amounts reclassified from accumulated other comprehensive loss	7.3		—		7.3
Other comprehensive income (loss), net of tax	13.3		(8.1)		5.2
Balance at December 31, 2020	$	(54.5)	$	0.2	$	(54.3)