ACCUMULATED OTHER COMPREHENSIVE LOSS - RECLASSIFICATIONS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Amount reclassified out of accumulated other comprehensive loss
Interest expense	$ 38.2us-gaap_InterestExpense	$ 38.9us-gaap_InterestExpense
Total before tax	(210.1)	(222.1)
Tax expense	(78.9)us-gaap_IncomeTaxExpenseBenefit	(81.9)us-gaap_IncomeTaxExpenseBenefit
Net of tax	(131.2)	(140.2)
Amount reclassified
Amount reclassified out of accumulated other comprehensive loss
Net of tax	0.8	(0.3)
Losses (gains) on cash flow hedges \| Amount reclassified
Amount reclassified out of accumulated other comprehensive loss
Tax expense	0.1	0.9
Net of tax	0.1	(0.6)
Losses (gains) on cash flow hedges \| Interest rate hedges \| Amount reclassified
Amount reclassified out of accumulated other comprehensive loss
Interest expense	0.2	0.3
Defined benefit plans \| Amount reclassified
Amount reclassified out of accumulated other comprehensive loss
Amortization of prior service costs (credits)	0.3	(0.1)
Amortization of net actuarial losses	0.9	0.7
Total before tax	1.2	0.6
Tax expense	0.5	0.3
Net of tax	$ 0.7	$ 0.3

The amount of gains or losses recognized in net periodic benefit cost.

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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

+ References

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the cost of borrowed funds accounted for as interest expense.

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