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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net periodic benefit cost:
Service cost	$ 2.4	$ 2.1	$ 4.9	$ 4.0
Interest cost	5.4	6.3	11.1	12.2
Expected return on plan assets	(5.1)	(5.2)	(10.1)	(9.4)
Amortization of prior service cost	0.1	0.2	0.2	0.4
Amortization of net actuarial loss	3.0	2.7	6.7	5.2
Net periodic benefit cost	5.8	6.1	12.8	12.4
Pension [Member]
Net periodic benefit cost:
Service cost	1.6	1.6	3.4	2.9
Interest cost	3.4	4.1	7.0	7.7
Expected return on plan assets	(4.9)	(5.0)	(9.8)	(9.1)
Amortization of prior service cost	0.2	0.2	0.4	0.5
Amortization of net actuarial loss	2.1	1.6	4.5	3.1
Net periodic benefit cost	2.4	2.5	5.5	5.1
Others Benefits [Member]
Net periodic benefit cost:
Service cost	0.8	0.5	1.5	1.1
Interest cost	2.0	2.2	4.1	4.5
Expected return on plan assets	(0.2)	(0.2)	(0.3)	(0.3)
Amortization of prior service cost	(0.1)	0	(0.2)	(0.1)
Amortization of net actuarial loss	0.9	1.1	2.2	2.1
Net periodic benefit cost	$ 3.4	$ 3.6	$ 7.3	$ 7.3