PENSION AND OTHER POST RETIREMENT BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension Benefits
Changes in net periodic benefit cost
Service cost - benefits earned during the period	$ 1.0	$ 1.1	$ 1.9	$ 1.7
Interest cost on projected benefit obligations	4.0	4.4	7.9	8.5
Expected return on plan assets	(3.9)	(4.8)	(7.9)	(9.1)
Amortization of net actuarial loss	1.3	0.8	2.6	1.6
Net periodic benefit cost	2.4	1.5	4.5	2.7
Settlements	9.0	0.1	9.0	0.1
Total net periodic benefit cost	11.4	1.6	13.5	2.8
Other Benefits
Changes in net periodic benefit cost
Service cost - benefits earned during the period	0.3	0.2	0.5	0.4
Interest cost on projected benefit obligations	0.3	0.4	0.6	0.7
Amortization of net actuarial loss	0.5	0.5	1.0	0.9
Amortization of prior service (benefit)	(0.1)	(0.1)	(0.1)	(0.1)
Net periodic benefit cost	1.0	1.0	2.0	1.9
Total net periodic benefit cost	1.0	1.0	2.0	1.9
U.S. Pension Plan
Changes in net periodic benefit cost
Settlements			$ 9.0	$ 0