EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2018

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

The Company	Pension Benefits						Other Postretirement Benefits
	2018			2017			2018		2017
Three months ended March 31,
Service cost	$	5.0		$	5.3		$	1.2	$	1.2
Interest cost	8.5			9.4			2.7		2.9
Expected return on assets	(14.3		)	(13.8		)	—		—
Prior service cost amortization	0.1			0.4			—		—
Amortization of actuarial losses	3.0			3.9			0.5		0.4
Net periodic benefit cost	$	2.3		$	5.2		$	4.4	$	4.5

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
	2018			2017			2018		2017
Three months ended March 31,
Service cost	$	4.1		$	4.4		$	1.0	$	1.0
Interest cost	7.2			8.1			2.1		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			0.4		0.3
Net periodic benefit cost	$	1.8		$	4.4		$	3.5	$	3.7

SCEG

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

Consolidated SCE&G	Pension Benefits						Other Postretirement Benefits
	2018			2017			2018		2017
Three months ended March 31,
Service cost	$	4.1		$	4.4		$	1.0	$	1.0
Interest cost	7.2			8.1			2.1		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			0.4		0.3
Net periodic benefit cost	$	1.8		$	4.4		$	3.5	$	3.7