SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Change in accounting estimates (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Accounting Policies [Abstract]
Decrease in depreciation	$ 4.6	$ 9.2
income impact from change of estimates	$ 3.8	$ 4.4