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EMPLOYEE BENEFIT PLANS (Tables)

12 Months Ended

Dec. 31, 2014

Defined Benefit Plan Disclosure [Line Items]

Schedule of Changes in Projected Benefit Obligations [Table Text Block]

The measurement date used to determine pension and other postretirement benefit obligations is December 31. Data related to the changes in the projected benefit obligation for pension benefits and the accumulated benefit obligation for other postretirement benefits are presented below.



	Pension Benefits						Other Postretirement Benefits
Millions of dollars	2014			2013			2014			2013
Benefit obligation, January 1	$	823.0		$	931.6		$	238.0		$	265.3
Service cost	20.0			21.8			4.6			5.9
Interest cost	40.4			38.5			12.0			11.1
Plan participants’ contributions	—			—			2.2			2.6
Actuarial (gain) loss	100.1			(83.4		)	23.5			(35.1		)
Benefits paid	(64.0		)	(60.0		)	(12.1		)	(11.8		)
Curtailment	—			(25.5		)	—			—
Benefit obligation, December 31	$	919.5		$	823.0		$	268.2		$	238.0

Schedule of Assumptions Used to Determine Benefit Obligations [Table Text Block]

Significant assumptions used to determine the above benefit obligations are as follows:



	Pension Benefits				Other Postretirement Benefits
	2014		2013		2014		2013
Annual discount rate used to determine benefit obligation	4.20	%	5.03	%	4.30	%	5.19	%
Assumed annual rate of future salary increases for projected benefit obligation	3.00	%	3.00	%	3.00	%	3.75	%

Schedule of Net Funded Status [Table Text Block]



Millions of Dollars	Pension Benefits					Other Postretirement Benefits
December 31,	2014			2013		2014			2013
Fair value of plan assets	$	861.8		$	870.0	—			—
Benefit obligation	919.5			823.0		$	268.2		$	238.0
Funded status	$	(57.7	)	$	47.0	$	(268.2	)	$	(238.0	)

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

Amounts recognized on the consolidated balance sheets were as follows:



Millions of Dollars	Pension Benefits					Other Postretirement Benefits
December 31,	2014			2013		2014			2013
Current liability	—			—		$	(11.2	)	$	(11.5	)
Noncurrent asset	—			$	47.0	—			—
Noncurrent liability	$	(57.7	)	—		(257.0		)	(226.5		)

Schedule of Defined Benefit Plan, Amounts Recognized in Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Amounts recognized in accumulated other comprehensive loss (a component of common equity) as of December 31, 2014 and 2013 were as follows:



Millions of Dollars	Pension Benefits				Other Postretirement Benefits
December 31,	2014		2013		2014		2013
Net actuarial loss	$	8.1	$	5.2	$	3.0	$	1.7
Prior service cost	0.3		0.5		0.1		0.1
Total	$	8.4	$	5.7	$	3.1	$	1.8

Schedule of defined benefit plan, amounts recognized in regulatory assets [Table Text Block]

Amounts recognized in regulatory assets as of December 31, 2014 and 2013 were as follows:



Millions of Dollars	Pension Benefits				Other Postretirement Benefits
December 31,	2014		2013		2014		2013
Net actuarial loss	$	222.1	$	124.8	$	43.8	$	24.4
Prior service cost	9.6		12.8		0.6		0.9
Total	$	231.7	$	137.6	$	44.4	$	25.3

Schedule of Changes in Fair Value of Plan Assets [Table Text Block]



	Pension Benefits
Millions of dollars	2014			2013
Fair value of plan assets, January 1	$	870.0		$	799.1
Actual return on plan assets	55.8			130.9
Benefits paid	(64.0		)	(60.0		)
Fair value of plan assets, December 31	$	861.8		$	870.0

Schedule of Allocation of Plan Assets [Table Text Block]

The Company’s pension plan asset allocation at December 31, 2014 and 2013 and the target allocation for 2015 are as follows:



	Percentage of Plan Assets
	Target Allocation		At December 31,
Asset Category	2015		2014		2013
Equity Securities	58	%	57	%	59	%
Fixed Income	33	%	34	%	32	%
Hedge Funds	9	%	9	%	9	%

Schedule of Fair Value of Plan, Assets by Measurement Levels [Table Text Block]

Assets held by the pension plan are measured at fair value as described below. Assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. At December 31, 2014 and 2013, fair value measurements, and the level within the fair value hierarchy in which the measurements fall, were as follows:



	Fair Value Measurements at Reporting Date Using
Millions of dollars	Total		Level 2		Level 3		Total		Level 1		Level 2		Level 3
	December 31, 2014						December 31, 2013
Common stock	—		—		—		$	332	$	332	—		—
Preferred stock	—		—		—		1		1		—		—
Mutual funds	$	622	$	622	—		305		20		$	285	—
Short-term investment vehicles	20		20		—		19		—		19		—
US Treasury securities	6		6		—		33		—		33		—
Corporate debt securities	86		86		—		53		—		53		—
Loans secured by mortgages	—		—		—		12		—		12		—
Municipals	15		15		—		4		—		4		—
Limited partnerships	32		32		—		35		1		34		—
Multi‑strategy hedge funds	81		—		$	81	76		—		—		$	76
	$	862	$	781	$	81	$	870	$	354	$	440	$	76

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]



	Fair Value Measurements Level 3
Millions of dollars	2014		2013
Beginning Balance	$	76	$	70
Unrealized gains included in changes in net assets	5		6
Purchases, issuances, and settlements	—		—
Ending Balance	$	81	$	76

Schedule of Expected Benefit Payments [Table Text Block]



Millions of dollars	Pension Benefits		Other Postretirement Benefits
2015	$	63.4	$	11.5
2016	64.5		12.4
2017	65.6		13.1
2018	66.1		13.8
2019	65.1		14.6
2020-2024	338.4		81.8

Schedule of Net Benefit Costs [Table Text Block]



	Pension Benefits									Other Postretirement Benefits
Millions of dollars	2014			2013			2012			2014		2013		2012
Service cost	$	20.0		$	21.8		$	19.6		$	4.6	$	5.9	$	4.8
Interest cost	40.4			38.5			43.0			12.0		11.1		11.9
Expected return on assets	(66.7		)	(61.4		)	(59.5		)	n/a		n/a		n/a
Prior service cost amortization	4.1			6.0			7.0			0.3		0.7		0.9
Amortization of actuarial losses	4.8			16.9			18.4			—		3.3		1.4
Transition obligation amortization	—			—			—			—		0.3		0.7
Curtailment	—			9.9			—			—		—		—
Net periodic benefit cost	$	2.6		$	31.7		$	28.5		$	16.9	$	21.3	$	19.7

Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]

Other changes in plan assets and benefit obligations recognized in other comprehensive income (net of tax) were as follows:



	Pension Benefits									Other Postretirement Benefits
Millions of dollars	2014			2013			2012			2014		2013			2012
Current year actuarial (gain) loss	$	3.1		$	(5.0	)	$	1.7		$	1.3	$	(1.8	)	$	2.0
Amortization of actuarial losses	(0.2		)	(0.5		)	(0.6		)	—		(0.2		)	—
Amortization of prior service cost	(0.2		)	(0.2		)	(0.2		)	—		—			—
Prior service cost (credit)	—			(0.3		)	—			—		—			—
Amortization of transition obligation	—			—			—			—		(0.1		)	(0.1		)
Total recognized in OCI	$	2.7		$	(6.0	)	$	0.9		$	1.3	$	(2.1	)	$	1.9

Schedule of defined benefit plan, Other changes in plan assets recognized in regulatory assets [Table Text Block]

Other changes in plan assets and benefit obligations recognized in regulatory assets were as follows:



	Pension Benefits									Other Postretirement Benefits
Millions of dollars	2014			2013			2012			2014			2013			2012
Current year actuarial (gain) loss	$	101.3		$	(157.5	)	$	45.0		$	19.4		$	(29.9	)	$	31.4
Amortization of actuarial losses	(4.0		)	(14.7		)	(16.0		)	—			(2.7		)	(1.2		)
Amortization of prior service cost	(3.2		)	(5.2		)	(6.4		)	(0.3		)	(0.6		)	(0.8		)
Prior service cost (credit)	—			(8.9		)	—			—			—			—
Amortization of transition obligation	—			—			—			—			(0.2		)	(0.5		)
Total recognized in regulatory assets	$	94.1		$	(186.3	)	$	22.6		$	19.1		$	(33.4	)	$	28.9

Schedule of Assumptions Used in Determining Net Periodic Benefit Cost [Table Text Block]



	Pension Benefits						Other Postretirement Benefits
	2014		2013		2012		2014		2013		2012
Discount rate	5.03	%	4.10%/5.07%		5.25	%	5.19	%	4.19	%	5.35	%
Expected return on plan assets	8.00	%	8.00	%	8.25	%	n/a		n/a		n/a
Rate of compensation increase	3.00	%	3.75%/3.00%		4.00	%	3.75	%	3.75	%	4.00	%
Health care cost trend rate	n/a		n/a		n/a		7.40	%	7.80	%	8.20	%
Ultimate health care cost trend rate	n/a		n/a		n/a		5.00	%	5.00	%	5.00	%
Year achieved	n/a		n/a		n/a		2020		2020		2020

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]

The estimated amounts to be amortized from accumulated other comprehensive loss into net periodic benefit cost in 2015 are as follows:



Millions of Dollars	Pension Benefits		Other Postretirement Benefits
Actuarial loss	$	0.5	$	0.1
Prior service cost	0.1		—
Total	$	0.6	$	0.1

Schedule of amounts in regulatory assets to be recognized over the next fiscal year [Table Text Block]

The estimated amounts to be amortized from regulatory assets into net periodic benefit cost in 2015 are as follows:



Millions of Dollars	Pension Benefits		Other Postretirement Benefits
Actuarial loss	$	12.3	$	1.9
Prior service cost	3.6		0.3
Total	$	15.9	$	2.2

SCE&G