POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2020

Retirement Benefits [Abstract]

Net Periodic Benefit Cost of Pension Plans and Other Employee Related Benefit Plans

The following table provides the components of net periodic benefit cost for pension plans and other employee-related benefit plans for the three and six months ended June 30, 2020 and 2019. 

	2020									2019
For the Three Months Ended June 30	Pension			Other Benefits			Total			Pension			Other Benefits			Total
Service cost		$	0.3		$	0.2		$	0.5		$	0.3		$	0.1		$	0.4
Interest cost		2.3			0.7			3.0			3.2			1.0			4.2
Expected return on plan assets		(2.1)			—			(2.1)			(3.4)			—			(3.4)
Amortization of prior service (benefit) cost		—			(1.3)			(1.3)			0.2			(1.3)			(1.1)
Amortization of net actuarial loss		1.7			0.8			2.5			1.3			0.5			1.8
Total net periodic benefit cost		$	2.2		$	0.4		$	2.6		$	1.6		$	0.3		$	1.9

	2020									2019
For the Six Months Ended June 30	Pension			Other Benefits			Total			Pension			Other Benefits			Total
Service cost		$	0.6		$	0.4		$	1.0		$	0.7		$	0.3		$	1.0
Interest cost		4.6			1.4			6.0			6.3			2.0			8.3
Expected return on plan assets		(4.3)			—			(4.3)			(7.2)			—			(7.2)
Amortization of prior service (benefit) cost		—			(2.5)			(2.5)			0.4			(2.6)			(2.2)
Amortization of net actuarial loss		3.5			1.4			4.9			2.6			1.1			3.7
Total net periodic benefit cost		$	4.4		$	0.7		$	5.1		$	2.8		$	0.8		$	3.6