EMPLOYEE BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2018

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

The Company	Pension Benefits						Other Postretirement Benefits
Millions of dollars	2018			2017			2018		2017
Three months ended June 30,
Service cost	$	4.9		$	5.3		$	1.1	$	1.2
Interest cost	8.6			9.4			2.7		2.9
Expected return on assets	(14.3		)	(13.8		)	—		—
Prior service cost amortization	0.2			0.4			—		—
Amortization of actuarial losses	2.9			3.9			0.6		0.4
Net periodic benefit cost	$	2.3		$	5.2		$	4.4	$	4.5
Six months ended June 30,
Service cost	$	9.9		$	10.5		$	2.3	$	2.3
Interest cost	17.1			18.9			5.4		5.9
Expected return on assets	(28.6		)	(27.6		)	—		—
Prior service cost amortization	0.3			0.8			—		—
Amortization of actuarial losses	5.9			7.9			1.1		0.7
Net periodic benefit cost	$	4.6		$	10.5		$	8.8	$	8.9

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
Millions of dollars	2018			2017			2018		2017
Three months ended June 30,
Service cost	$	4.0		$	4.4		$	0.8	$	1.0
Interest cost	7.2			8.1			2.2		2.4
Expected return on assets	(12.1		)	(11.8		)	—		—
Prior service cost amortization	0.1			0.3			—		—
Amortization of actuarial losses	2.5			3.4			0.5		0.3
Net periodic benefit cost	$	1.7		$	4.4		$	3.5	$	3.7
Six months ended June 30,
Service cost	$	8.1		$	8.8		$	1.8	$	1.9
Interest cost	14.4			16.1			4.3		4.8
Expected return on assets	(24.2		)	(23.6		)	—		—
Prior service cost amortization	0.2			0.7			—		—
Amortization of actuarial losses	5.0			6.7			0.9		0.6
Net periodic benefit cost	$	3.5		$	8.7		$	7.0	$	7.3

SCEG

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
Millions of dollars	2018			2017			2018		2017
Three months ended June 30,
Service cost	$	4.0		$	4.4		$	0.8	$	1.0
Interest cost	7.2			8.1			2.2		2.4
Expected return on assets	(12.1		)	(11.8		)	—		—
Prior service cost amortization	0.1			0.3			—		—
Amortization of actuarial losses	2.5			3.4			0.5		0.3
Net periodic benefit cost	$	1.7		$	4.4		$	3.5	$	3.7
Six months ended June 30,
Service cost	$	8.1		$	8.8		$	1.8	$	1.9
Interest cost	14.4			16.1			4.3		4.8
Expected return on assets	(24.2		)	(23.6		)	—		—
Prior service cost amortization	0.2			0.7			—		—
Amortization of actuarial losses	5.0			6.7			0.9		0.6
Net periodic benefit cost	$	3.5		$	8.7		$	7.0	$	7.3