EMPLOYEE BENEFITS (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Contribution Benefits
Discretionary contribution to pension plans in 2012	$ 20
Total cost recognized for all defined contribution benefit plans	19.3	19.2	16.4
Pension Benefits
Estimated future benefit payments expected to be paid
2012	25.1
2013	28.2
2014	30.2
2015	30.5
2016	31.5
Years 2017 - 2021	146.5
Defined Contribution Benefits
Employer contributions	9.5	55.4	27.1
Other Benefits
Estimated future benefit payments expected to be paid
2012	0.5
2013	0.8
2014	1.2
2015	1.5
2016	1.8
Years 2017 - 2021	11.5
Defined Contribution Benefits
Employer contributions	$ 0.2	$ 0.1