ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

9 Months Ended

Sep. 30, 2021

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS).

Schedule of changes in accumulated other comprehensive income (loss) by component, net of tax

Changes in accumulated other comprehensive income (loss) by component, net of tax, for the nine months ended September 30, 2021 consisted of the following:

									Accumulated
			Post-		Non-				Other
	Pension		Retirement		Qualified				Comprehensive
(In millions)	Benefits		Benefits		Plans		Other		Income (Loss)
Balance at December 31, 2020	$	(61.7)	$	12.2	$	(0.6)	$	(0.7)	$	(50.8)
Amortization of prior service cost		(0.4)		(0.7)		—		—		(1.1)
Amortization of net loss		0.9		0.2		0.1		—		1.2
Foreign currency exchange		—		—		—		(0.2)		(0.2)
Balance at March 31, 2021		(61.2)		11.7		(0.5)		(0.9)		(50.9)
Amortization of prior service cost		(0.4)		(0.7)		(0.1)		—		(1.2)
Amortization of net loss		1.0		0.3		—		—		1.3
Foreign currency exchange		—		—		—		(0.1)		(0.1)
Other adjustments		—		—		—		0.2		0.2
Balance at June 30, 2021		(60.6)		11.3		(0.6)		(0.8)		(50.7)
Amortization of prior service cost		(0.5)		(0.6)		—		—		(1.1)
Amortization of net loss		1.0		—		—		—		1.0
Foreign currency exchange		—		—		—		(0.1)		(0.1)
Balance at September 30, 2021	$	(60.1)	$	10.7	$	(0.6)	$	(0.9)	$	(50.9)

Changes in accumulated other comprehensive income (loss) by component, net of tax, for the nine months ended September 30, 2020 consisted of the following:

									Accumulated
			Post-		Non-				Other
	Pension		Retirement		Qualified				Comprehensive
(In millions)	Benefits		Benefits		Plans		Other		Income (Loss)
Balance at December 31, 2019	$	(51.9)	$	16.3	$	(0.4)	$	(0.9)	$	(36.9)
Amortization of prior service cost		(0.5)		(0.6)		(0.1)		—		(1.2)
Amortization of net loss		1.1		0.1		0.1		—		1.3
Foreign currency exchange		—		—		—		(0.5)		(0.5)
Other adjustments		—		—		—		(0.2)		(0.2)
Balance at March 31, 2020		(51.3)		15.8		(0.4)		(1.6)		(37.5)
Amortization of prior service cost		(0.4)		(0.7)		—		—		(1.1)
Amortization of net loss		1.1		0.1		0.1		—		1.3
Foreign currency exchange		—		—		—		0.3		0.3
Other adjustments		—		—		—		(0.4)		(0.4)
Balance at June 30, 2020		(50.6)		15.2		(0.3)		(1.7)		(37.4)
Amortization of prior service cost		(0.4)		(0.8)		—		—		(1.2)
Amortization of net loss (gain)		0.3		0.3		(0.1)		—		0.5
Foreign currency exchange		—		—		—		0.1		0.1
Other adjustments		—		—		—		0.1		0.1
Balance at September 30, 2020	$	(50.7)	$	14.7	$	(0.4)	$	(1.5)	$	(37.9)