PENSION AND POST-RETIREMENT PLANS (Details) - USD ($) $ in Millions		6 Months Ended
	Apr. 10, 2015	Jun. 30, 2015	Jun. 30, 2014
Pension Benefits
Components of Net Periodic Benefit Cost
Service cost		$ 1.7	$ 1.7
Interest cost		4.8	4.7
Expected return on plan assets		(6.9)	(7.0)
Amortization of net gain		3.2	1.5
Amortization of prior service cost		(1.2)	(1.2)
Net periodic cost (benefit)		1.6	(0.3)
Initial contribution	$ 1.6
Full year expected cash contributions to pension plan		6.2
Post-retirement Benefits
Components of Net Periodic Benefit Cost
Service cost		0.8	0.5
Interest cost		1.3	1.3
Amortization of net gain		1.2	0.3
Net periodic cost (benefit)		$ 3.3	$ 2.1