DERIVATIVES AND OTHER FINANCIAL INSTRUMENTS (Details 3) (USD $) In Millions, unless otherwise specified			3 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended			1 Months Ended						3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Interest Rate Swap [Member]	Dec. 31, 2013 Interest Rate Swap [Member]	Jun. 30, 2014 Commodity Option [Member] lb	Jun. 30, 2014 Fair value hedges Interest Rate Swap [Member]	Jun. 30, 2013 Fair value hedges Interest Rate Swap [Member]	Jun. 30, 2014 Fair value hedges Interest Rate Swap [Member]	Jun. 30, 2013 Fair value hedges Interest Rate Swap [Member]	Nov. 30, 2009 Fair value hedges Interest Rate Swap [Member]	Jul. 31, 2011 Fair value hedges Interest Rate Swap [Member] Terminated contracts	Nov. 30, 2010 Fair value hedges Interest Rate Swap [Member] Terminated contracts	Dec. 31, 2013 Lower limit Interest Rate Swap [Member]	Dec. 31, 2013 Upper limit Interest Rate Swap [Member]	Jun. 30, 2014 4.90% Notes due 2019	Dec. 31, 2013 4.90% Notes due 2019	Jun. 30, 2014 4.90% Notes due 2019 Fair value hedges Interest Rate Swap [Member]	Jun. 30, 2013 4.90% Notes due 2019 Fair value hedges Interest Rate Swap [Member]	Jun. 30, 2014 4.90% Notes due 2019 Fair value hedges Interest Rate Swap [Member]	Jun. 30, 2013 4.90% Notes due 2019 Fair value hedges Interest Rate Swap [Member]	May 31, 2014 4.90% Notes due 2019 Fair value hedges Interest Rate Swap [Member]
Interest rate swap fair value hedges
Derivative, Nonmonetary Notional Amount, Mass					2,300,000
Notional Amount of Underlying Debt				$ 500.0						$ 700.0
Notional Amount											500.0	200.0									700.0
Cash received											23.5	15.6
Stated rate (as a percent)															4.90%	4.90%	4.90%		4.90%
Derivative, Forward Interest Rate													3.79%	3.94%
Deferred Gains/(Losses) on Derivatives Qualifying as Hedges for the Period																	(3.5)		(3.5)
Variable Rate Paid																	3.14%		3.14%
Amortization of basis adjustment for terminated interest rate swaps recognized in interest expense			0.2			(2.3)	(2.3)	(4.6)	(4.6)
Derivative, Net Hedge Ineffectiveness Gain (Loss)						(3.3)	(2.3)	(5.6)	(4.6)								(1.0)	0	(1.0)	0
Money market funds, classified as Level Two	$ 608.2	$ 447.8