PENSION AND OTHER POST RETIREMENT BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Change in fair value of plan assets:
Employer contributions			$ 24.9
Pension Benefits
Changes in net periodic benefit cost
Service cost - benefits earned during the period	1.0	0.8	2.9	2.5
Interest cost on projected benefit obligations	3.8	4.2	11.7	12.7
Expected return on plan assets	(4.2)	(4.2)	(12.1)	(13.3)
Amortization of net actuarial loss	1.4	0.7	4.0	2.3
Amortization of prior service (benefit)	0	0	0	0
Net periodic benefit cost	2.0	1.5	6.5	4.2
Settlements	4.1	0	13.1	0.1
Total net periodic benefit cost	6.1	1.5	19.6	4.3
Other Benefits
Changes in net periodic benefit cost
Service cost - benefits earned during the period	0.2	0.2	0.7	0.6
Interest cost on projected benefit obligations	0.4	0.3	1.0	1.0
Expected return on plan assets	0	0	0	0
Amortization of net actuarial loss	0.4	0.4	1.4	1.3
Amortization of prior service (benefit)	0	0	(0.1)	(0.1)
Net periodic benefit cost	1.0	0.9	3.0	2.8
Settlements	0	0	0	0
Total net periodic benefit cost	1.0	0.9	3.0	2.8
U.S. Pension Plan
Changes in net periodic benefit cost
Settlements			$ 13.1	$ 0