ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

3 Months Ended

Mar. 31, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of changes, net of tax, to accumulated other comprehensive loss

The following tables show the changes, net of tax, to our accumulated other comprehensive loss:

Three Months Ended March 31, 2015							Accumulated Other
(Millions)	Cash Flow Hedges			Defined Benefit Plans			Comprehensive Loss
Beginning balance at December 31, 2014	$	(3.2	)	$	(24.4	)	$	(27.6	)
Amounts reclassified out of accumulated other comprehensive loss	0.1			0.7			0.8
Ending balance at March 31, 2015	$	(3.1	)	$	(23.7	)	$	(26.8	)

Three Months Ended March 31, 2014							Accumulated Other
(Millions)	Cash Flow Hedges			Defined Benefit Plans			Comprehensive Loss
Beginning balance at December 31, 2013	$	(3.1	)	$	(20.1	)	$	(23.2	)
Other comprehensive loss before reclassifications	—			(0.1		)	(0.1		)
Amounts reclassified out of accumulated other comprehensive loss	(0.6		)	0.3			(0.3		)
Net current period other comprehensive (loss) income	(0.6		)	0.2			(0.4		)
Ending balance at March 31, 2014	$	(3.7	)	$	(19.9	)	$	(23.6	)

Schedule of reclassifications out of accumulated other comprehensive loss

The following table shows the reclassifications out of accumulated other comprehensive loss:

	Amount Reclassified
	Three Months Ended March 31					Affected Line Item in the Statements of Income
(Millions)	2015		2014
Losses (gains) on cash flow hedges
Interest rate hedges	$	0.2	$	0.3		Interest expense
	0.1		0.9			Tax expense
	0.1		(0.6		)	Net of tax
Defined benefit plans
Amortization of prior service costs (credits)	0.3		(0.1		)	*
Amortization of net actuarial losses	0.9		0.7			*
	1.2		0.6			Total before tax
	0.5		0.3			Tax expense
	0.7		0.3			Net of tax
Total reclassifications	$	0.8	$	(0.3	)

* These items are included in the computation of net periodic benefit cost. See Note 13, Employee Benefit Plans, for more information.