PENSION AND POSTRETIREMENT 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
Defined Benefit Plan and Postretirement Plan Disclosure
Pension Contributions			$ 4.5
Minimum non-elective contribution (NEC) % for the 401(K) plan (in hundredths)			3.00%
Discretionary contribution % for the 401(K) plan, range mininum			1.00%
Discretionary contribution % for the 401(K) plan, range maximum			3.00%
Defined contribution retirement plan cost	11.8	10.7	24.3	22.4
Defined Benefit Plans [Member]
Defined Benefit Plan and Postretirement Plan Disclosure
Service cost for benefits earned	0.6	0.7	1.2	1.3
Interest cost on benefit obligation	3.7	4.2	7.4	8.6
Expected return on plan assets	(4.2)	(4.8)	(8.6)	(9.3)
Net amortization and deferral	2.9	2.0	6.0	3.7
Defined benefit plan costs	3.0	2.1	6.0	4.3
Post-Retirement Medical Plan [Member]
Defined Benefit Plan and Postretirement Plan Disclosure
Service cost for benefits earned	0.1	0.1	0.2	0.2
Interest cost on benefit obligation	0.6	0.5	1.2	1.1
Net amortization and deferral	0	0	0	0
Defined benefit plan costs	$ 0.7	$ 0.6	$ 1.4	$ 1.3