REVOLVING CREDIT FACILITY AND SHORT-TERM BORROWING (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Revolving Credit Facility Terminated [Member]
Line of Credit Facility [Abstract]
Line of credit facility, maximum borrowing capacity	$ 600
Revolving credit facility expiration date	October 2012
Revolving Credit Facility Expires 2016 [Member]
Line of Credit Facility [Abstract]
Line of credit facility, maximum borrowing capacity	$ 800
Revolving credit facility initiation date	April 28, 2011
Revolving credit facility expiration date	April 2016
Line of Credit Facility, Covenant Terms	The new facility also contains a financial covenant requiring a minimum coverage ratio of adjusted pre-tax income to fixed obligations, as defined.
Line of Credit Facility, Covenant Compliance	As of December 31, 2011 and 2010, the Company was in compliance with this covenant and there were no amounts outstanding under the previous or current revolving credit facility.