POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2018

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, 2018 and 2017. 

	2018												2017
For the Three Months Ended June 30	Pension				Other Benefits				Total				Pension				Other Benefits				Total
Service cost		$	0.4			$	0.2			$	0.6			$	0.6			$	0.2			$	0.8
Interest cost		2.8				1.1				3.9				3.0				1.2				4.2
Expected return on plan assets(a)		(3.4		)		(0.1		)		(3.5		)		(3.7		)		(0.1		)		(3.8		)
Amortization of prior service cost (benefit)		0.2				(1.3		)		(1.1		)		0.3				(1.5		)		(1.2		)
Amortization of net actuarial loss		1.5				1.1				2.6				1.8				1.0				2.8
Total net periodic benefit cost		$	1.5			$	1.0			$	2.5			$	2.0			$	0.8			$	2.8
	2018												2017
For the Six Months Ended June 30	Pension				Other Benefits				Total				Pension				Other Benefits				Total
Service cost		$	0.8			$	0.4			$	1.2			$	1.2			$	0.4			$	1.6
Interest cost		5.6				2.2				7.8				6.0				2.3				8.3
Expected return on plan assets(a)		(6.8		)		(0.2		)		(7.0		)		(7.5		)		(0.2		)		(7.7		)
Amortization of prior service cost (benefit)		0.4				(2.6		)		(2.2		)		0.5				(2.9		)		(2.4		)
Amortization of net actuarial loss		3.0				2.2				5.2				3.5				2.1				5.6
Total net periodic benefit cost		$	3.0			$	2.0			$	5.0			$	3.7			$	1.7			$	5.4

(a)

Includes plan administrative expenses of $0.9 and $0.8, and $1.8 and $1.6 for the three and six months ended June 30, 2018 and 2017, respectively. The prior year plan administrative expenses have been reclassified from the service cost component line to conform to the current year presentation.