ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)

6 Months Ended

Jun. 30, 2019

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 six months ended June 30, 2019 consisted of the following:

									Accumulated
					Non-				Other
			Post-		Qualified				Comprehensive
(In millions)	Pensions		Retirement		Plans		Other		Income (Loss)
Balance at December 31, 2018	$	(55.8)	$	21.7	$	(0.1)	$	(0.3)	$	(34.5)
Amortization of prior service cost		(0.4)		(0.7)		—		—		(1.1)
Amortization of net loss		0.7		0.2		—		—		0.9
Balance at March 31, 2019	$	(55.5)	$	21.2	$	(0.1)	$	(0.3)	$	(34.7)
Amortization of prior service cost		(0.5)		(0.7)		(0.1)		0.1		(1.2)
Amortization of net loss (gain)		0.7		0.1		0.1		—		0.9
Other adjustments		—		—		—		(0.2)		(0.2)
Balance at June 30, 2019	$	(55.3)	$	20.6	$	(0.1)	$	(0.4)	$	(35.2)

Changes in accumulated other comprehensive income (loss) by component, net of tax, for the six months ended June 30, 2018 consisted of the following:

									Accumulated
					Non-				Other
			Post-		Qualified				Comprehensive
(In millions)	Pensions		Retirement		Plans		Other		Income (Loss)
Balance at December 31, 2017	$	(40.6)	$	15.6	$	(0.3)	$	0.4	$	(24.9)
Reclassification adjustment related to the Tax Act (1)		(9.2)		3.4		(0.2)		—		(6.0)
Amortization of prior service cost		(0.4)		(0.9)		—		—		(1.3)
Amortization of net loss		0.9		0.3		0.1		—		1.3
Other adjustments		—		—		—		0.2		0.2
Balance at March 31, 2018	$	(49.3)	$	18.4	$	(0.4)	$	0.6	$	(30.7)
Amortization of prior service cost		(0.5)		(0.5)		(0.1)		—		(1.1)
Amortization of net loss (gain)		0.9		0.2		0.1		(0.7)		0.5
Other adjustments		—		—		—		(0.3)		(0.3)
Balance at June 30, 2018	$	(48.9)	$	18.1	$	(0.4)	$	(0.4)	$	(31.6)

(1) Reclassification from accumulated other comprehensive income (loss) to retained earnings for the remeasurement tax effects resulting from the Tax Act in accordance with ASU 2018-02.