EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Sep. 30, 2015

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

	Pension Benefits						Other Postretirement Benefits
Millions of dollars	2015			2014			2015		2014
Three months ended September 30,
Service cost	$	6.6		$	5.0		$	1.2	$	0.9
Interest cost	9.6			9.9			2.8		2.8
Expected return on assets	(15.5		)	(16.4		)	—		—
Prior service cost amortization	1.0			1.1			0.1		0.1
Amortization of actuarial losses (gains)	3.2			0.9			0.4		(0.2		)
Net periodic benefit cost	$	4.9		$	0.5		$	4.5	$	3.6

Nine months ended September 30,
Service cost	$	18.1		$	15.0		$	4.0	$	3.4
Interest cost	28.7			30.3			8.6		9.0
Expected return on assets	(46.5		)	(50.0		)	—		—
Prior service cost amortization	3.0			3.1			0.3		0.3
Amortization of actuarial losses	10.2			3.5			1.5		—
Net periodic benefit cost	$	13.5		$	1.9		$	14.4	$	12.7

SCEG

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

	Pension Benefits						Other Postretirement Benefits
Millions of dollars	2015			2014			2015		2014
Three months ended September 30,
Service cost	$	5.3		$	4.0		$	1.0	$	0.7
Interest cost	8.1			8.4			2.2		2.3
Expected return on assets	(13.0		)	(13.9		)	—		—
Prior service cost amortization	0.8			0.9			0.1		—
Amortization of actuarial losses (gains)	2.7			0.8			0.3		(0.2		)
Net periodic benefit cost	$	3.9		$	0.2		$	3.6	$	2.8

Nine months ended September 30,
Service cost	$	14.5		$	12.0		$	3.2	$	2.7
Interest cost	24.1			25.6			6.8		7.1
Expected return on assets	(39.1		)	(42.2		)	—		—
Prior service cost amortization	2.5			2.6			0.2		0.2
Amortization of actuarial losses	8.6			3.0			1.2		—
Net periodic benefit cost	$	10.6		$	1.0		$	11.4	$	10.0