POSTRETIREMENT BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2017

Compensation and Retirement Disclosure [Abstract]

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

The following tables provide 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, 2017 and 2016.

	2017												2016
For the Three Months Ended June 30	Pension				Other Benefits				Total				Pension				Other Benefits				Total
Service cost		$	1.4			$	0.2			$	1.6			$	1.3			$	0.2			$	1.5
Interest cost		3.0				1.2				4.2				3.5				1.2				4.7
Expected return on plan assets		(4.5		)		(0.1		)		(4.6		)		(5.1		)		(0.1		)		(5.2		)
Amortization of prior service cost (benefit)		0.3				(1.5		)		(1.2		)		0.3				(1.7		)		(1.4		)
Amortization of net actuarial loss		1.8				1.0				2.8				1.8				1.2				3.0
Total net periodic benefit cost		$	2.0			$	0.8			$	2.8			$	1.8			$	0.8			$	2.6
	2017												2016
For the Six Months Ended June 30	Pension				Other Benefits				Total				Pension				Other Benefits				Total
Service cost		$	2.8			$	0.4			$	3.2			$	2.5			$	0.4			$	2.9
Interest cost		6.0				2.3				8.3				6.9				2.4				9.3
Expected return on plan assets		(9.1		)		(0.2		)		(9.3		)		(10.1		)		(0.3		)		(10.4		)
Amortization of prior service cost (benefit)		0.5				(2.9		)		(2.4		)		0.5				(3.3		)		(2.8		)
Amortization of net actuarial loss		3.5				2.1				5.6				3.7				2.4				6.1
Total net periodic benefit cost		$	3.7			$	1.7			$	5.4			$	3.5			$	1.6			$	5.1