EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2017

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

The Company	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017		2016
Three months ended September 30,
Service cost	$	5.7		$	4.4		$	1.0	$	0.8
Interest cost	9.2			9.8			2.8		3.0
Expected return on assets	(13.4		)	(13.8		)	—		—
Prior service cost amortization	0.4			1.0			—		0.1
Amortization of actuarial losses	4.4			3.7			—		0.2
Net periodic benefit cost	$	6.3		$	5.1		$	3.8	$	4.1

Nine months ended September 30,
Service cost	$	16.3		$	15.5		$	3.4	$	3.3
Interest cost	28.0			29.5			8.6		9.1
Expected return on assets	(41.0		)	(41.9		)	—		—
Prior service cost amortization	1.2			3.0			—		0.2
Amortization of actuarial losses	12.2			11.1			0.8		0.4
Net periodic benefit cost	$	16.7		$	17.2		$	12.8	$	13.0

Pension and Other Postretirement Benefits Disclosure [Text Block]

EMPLOYEE BENEFIT PLANS

Components of net periodic benefit cost recorded by the Company and Consolidated SCE&G were as follows: 

The Company	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017		2016
Three months ended September 30,
Service cost	$	5.7		$	4.4		$	1.0	$	0.8
Interest cost	9.2			9.8			2.8		3.0
Expected return on assets	(13.4		)	(13.8		)	—		—
Prior service cost amortization	0.4			1.0			—		0.1
Amortization of actuarial losses	4.4			3.7			—		0.2
Net periodic benefit cost	$	6.3		$	5.1		$	3.8	$	4.1

Nine months ended September 30,
Service cost	$	16.3		$	15.5		$	3.4	$	3.3
Interest cost	28.0			29.5			8.6		9.1
Expected return on assets	(41.0		)	(41.9		)	—		—
Prior service cost amortization	1.2			3.0			—		0.2
Amortization of actuarial losses	12.2			11.1			0.8		0.4
Net periodic benefit cost	$	16.7		$	17.2		$	12.8	$	13.0

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017		2016
Three months ended September 30,
Service cost	$	4.8		$	3.6		$	0.8	$	0.7
Interest cost	7.8			8.3			2.3		2.5
Expected return on assets	(11.4		)	(11.7		)	—		—
Prior service cost amortization	0.3			0.8			—		0.1
Amortization of actuarial losses	3.7			3.2			—		0.1
Net periodic benefit cost	$	5.2		$	4.2		$	3.1	$	3.4

Nine months ended September 30,
Service cost	$	13.6		$	12.7		$	2.8	$	2.7
Interest cost	24.0			25.0			7.1		7.5
Expected return on assets	(35.0		)	(35.5		)	—		—
Prior service cost amortization	1.0			2.5			—		0.2
Amortization of actuarial losses	10.4			9.4			0.6		0.3
Net periodic benefit cost	$	14.0		$	14.1		$	10.5	$	10.7

No significant contribution to the pension trust is expected for the foreseeable future based on current market conditions and assumptions, nor is a limitation on benefit payments expected to apply. SCE&G recovers current pension costs through either a rate rider that may be adjusted annually for retail electric operations or through cost of service rates for gas operations. PSNC Energy recovers pension costs through cost of service rates.

SCEG

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017		2016
Three months ended September 30,
Service cost	$	4.8		$	3.6		$	0.8	$	0.7
Interest cost	7.8			8.3			2.3		2.5
Expected return on assets	(11.4		)	(11.7		)	—		—
Prior service cost amortization	0.3			0.8			—		0.1
Amortization of actuarial losses	3.7			3.2			—		0.1
Net periodic benefit cost	$	5.2		$	4.2		$	3.1	$	3.4

Nine months ended September 30,
Service cost	$	13.6		$	12.7		$	2.8	$	2.7
Interest cost	24.0			25.0			7.1		7.5
Expected return on assets	(35.0		)	(35.5		)	—		—
Prior service cost amortization	1.0			2.5			—		0.2
Amortization of actuarial losses	10.4			9.4			0.6		0.3
Net periodic benefit cost	$	14.0		$	14.1		$	10.5	$	10.7

Pension and Other Postretirement Benefits Disclosure [Text Block]

EMPLOYEE BENEFIT PLANS

Components of net periodic benefit cost recorded by the Company and Consolidated SCE&G were as follows: 

The Company	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017		2016
Three months ended September 30,
Service cost	$	5.7		$	4.4		$	1.0	$	0.8
Interest cost	9.2			9.8			2.8		3.0
Expected return on assets	(13.4		)	(13.8		)	—		—
Prior service cost amortization	0.4			1.0			—		0.1
Amortization of actuarial losses	4.4			3.7			—		0.2
Net periodic benefit cost	$	6.3		$	5.1		$	3.8	$	4.1

Nine months ended September 30,
Service cost	$	16.3		$	15.5		$	3.4	$	3.3
Interest cost	28.0			29.5			8.6		9.1
Expected return on assets	(41.0		)	(41.9		)	—		—
Prior service cost amortization	1.2			3.0			—		0.2
Amortization of actuarial losses	12.2			11.1			0.8		0.4
Net periodic benefit cost	$	16.7		$	17.2		$	12.8	$	13.0

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
	2017			2016			2017		2016
Three months ended September 30,
Service cost	$	4.8		$	3.6		$	0.8	$	0.7
Interest cost	7.8			8.3			2.3		2.5
Expected return on assets	(11.4		)	(11.7		)	—		—
Prior service cost amortization	0.3			0.8			—		0.1
Amortization of actuarial losses	3.7			3.2			—		0.1
Net periodic benefit cost	$	5.2		$	4.2		$	3.1	$	3.4

Nine months ended September 30,
Service cost	$	13.6		$	12.7		$	2.8	$	2.7
Interest cost	24.0			25.0			7.1		7.5
Expected return on assets	(35.0		)	(35.5		)	—		—
Prior service cost amortization	1.0			2.5			—		0.2
Amortization of actuarial losses	10.4			9.4			0.6		0.3
Net periodic benefit cost	$	14.0		$	14.1		$	10.5	$	10.7

No significant contribution to the pension trust is expected for the foreseeable future based on current market conditions and assumptions, nor is a limitation on benefit payments expected to apply. SCE&G recovers current pension costs through either a rate rider that may be adjusted annually for retail electric operations or through cost of service rates for gas operations. PSNC Energy recovers pension costs through cost of service rates.