POSTRETIREMENT BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2019

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 nine months ended September 30, 2019 and 2018. 

	2019												2018
For the Three Months Ended September 30	Pension				Other Benefits				Total				Pension				Other Benefits				Total
Service cost		$	0.4			$	0.2			$	0.6			$	0.4			$	0.2			$	0.6
Interest cost		3.1				1.0				4.1				3.0				1.0				4.0
Expected return on plan assets		(3.8		)		(0.1		)		(3.9		)		(4.4		)		—				(4.4		)
Amortization of prior service cost (benefit)		0.2				(1.3		)		(1.1		)		0.2				(1.3		)		(1.1		)
Amortization of net actuarial loss		1.3				0.6				1.9				1.5				0.9				2.4
Net periodic benefit cost		1.2				0.4				1.6				0.7				0.8				1.5
Loss from settlement or curtailment		—				—				—				1.4				—				1.4
Total net periodic benefit cost		$	1.2			$	0.4			$	1.6			$	2.1			$	0.8			$	2.9
	2019												2018
For the Nine Months Ended September 30	Pension				Other Benefits				Total				Pension				Other Benefits				Total
Service cost		$	1.1			$	0.5			$	1.6			$	1.2			$	0.6			$	1.8
Interest cost		9.4				3.0				12.4				8.6				3.2				11.8
Expected return on plan assets		(11.0		)		(0.1		)		(11.1		)		(11.2		)		(0.2		)		(11.4		)
Amortization of prior service cost (benefit)		0.6				(3.9		)		(3.3		)		0.6				(3.9		)		(3.3		)
Amortization of net actuarial loss		3.9				1.7				5.6				4.5				3.1				7.6
Net periodic benefit cost		4.0				1.2				5.2				3.7				2.8				6.5
Loss from settlement or curtailment		—				—				—				1.4				—				1.4
Total net periodic benefit cost		$	4.0			$	1.2			$	5.2			$	5.1			$	2.8			$	7.9