POSTRETIREMENT BENEFIT PLANS - Net Periodic Benefit Cost of Pension Plans and Other Employee Related Benefit Plans (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.7	$ 2.4	$ 3.4	$ 4.9
Interest cost	5.8	5.4	11.7	11.1
Expected return on plan assets	(5.3)	(5.1)	(10.7)	(10.1)
Amortization of prior service cost (benefit)	(1.3)	0.1	(2.6)	0.2
Amortization of net actuarial loss	2.3	3.0	4.6	6.7
Net periodic benefit cost	3.2	5.8	6.4	12.8
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.3	1.6	2.5	3.4
Interest cost	3.9	3.4	7.8	7.0
Expected return on plan assets	(5.2)	(4.9)	(10.4)	(9.8)
Amortization of prior service cost (benefit)	0.2	0.2	0.4	0.4
Amortization of net actuarial loss	1.5	2.1	3.1	4.5
Net periodic benefit cost	1.7	2.4	3.4	5.5
Others Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.4	0.8	0.9	1.5
Interest cost	1.9	2.0	3.9	4.1
Expected return on plan assets	(0.1)	(0.2)	(0.3)	(0.3)
Amortization of prior service cost (benefit)	(1.5)	(0.1)	(3.0)	(0.2)
Amortization of net actuarial loss	0.8	0.9	1.5	2.2
Net periodic benefit cost	$ 1.5	$ 3.4	$ 3.0	$ 7.3