SEGMENT OF BUSINESS INFORMATION (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The Company
Millions of dollars	External Revenue		Intersegment Revenue			Operating Income			Net Income
Three Months Ended June 30, 2018
Electric Operations	$	552	$	2		$	106		n/a
Gas Distribution	148		1			3			n/a
Gas Marketing	143		29			n/a			$	3
All Other	—		118			—			(24		)
Adjustments/Eliminations	—		(150		)	(6		)	29
Consolidated Total	$	843	$	—		$	103		$	8
Six Months Ended June 30, 2018
Electric Operations	$	1,098	$	3		$	179		n/a
Gas Distribution	509		1			116			n/a
Gas Marketing	416		60			n/a			$	20
All Other	—		223			—			(49		)
Adjustments/Eliminations	—		(287		)	(5		)	206
Consolidated Total	$	2,023	$	—		$	290		$	177

Three Months Ended June 30, 2017
Electric Operations	$	679	$	2		$	246	n/a
Gas Distribution	140		1			4		n/a
Gas Marketing	182		34			n/a		$	1
All Other	—		102			—		(7		)
Adjustments/Eliminations	—		(139		)	1		127
Consolidated Total	$	1,001	$	—		$	251	$	121
Six Months Ended June 30, 2017
Electric Operations	$	1,256	$	3		$	428	n/a
Gas Distribution	461		1			117		n/a
Gas Marketing	456		58			n/a		$	16
All Other	—		196			—		(7		)
Adjustments/Eliminations	—		(258		)	26		283
Consolidated Total	$	2,173	$	—		$	571	$	292

Consolidated SCE&G
Millions of dollars	External Revenue		Operating Income		Earnings Available to Common Shareholder
Three Months Ended June 30, 2018
Electric Operations	$	553	$	107	n/a
Gas Distribution	79		—		n/a
Adjustments/Eliminations	—		—		$	26
Consolidated Total	$	632	$	107	$	26
Six Months Ended June 30, 2018
Electric Operations	$	1,100	$	180	n/a
Gas Distribution	234		47		n/a
Adjustments/Eliminations	—		—		$	150
Consolidated Total	$	1,334	$	227	$	150

Three Months Ended June 30, 2017
Electric Operations	$	680	$	247	n/a
Gas Distribution	76		—		n/a
Adjustments/Eliminations	—		—		$	123
Consolidated Total	$	756	$	247	$	123
Six Months Ended June 30, 2017
Electric Operations	$	1,259	$	429	n/a
Gas Distribution	217		44		n/a
Adjustments/Eliminations	—		—		$	231
Consolidated Total	$	1,476	$	473	$	231

Segment Assets	The Company				Consolidated SCE&G
	June 30,		December 31,		June 30,		December 31,
Millions of dollars	2018		2017		2018		2017
Electric Operations	$	12,082	$	11,979	$	12,082	$	11,979
Gas Distribution	3,292		3,259		895		869
Gas Marketing	214		230		n/a		n/a
All Other	1,039		1,042		n/a		n/a
Adjustments/Eliminations	2,274		2,229		3,298		3,098
Consolidated Total	$	18,901	$	18,739	$	16,275	$	15,946

SCEG

Segment Reporting Information [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Consolidated SCE&G
Millions of dollars	External Revenue		Operating Income		Earnings Available to Common Shareholder
Three Months Ended June 30, 2018
Electric Operations	$	553	$	107	n/a
Gas Distribution	79		—		n/a
Adjustments/Eliminations	—		—		$	26
Consolidated Total	$	632	$	107	$	26
Six Months Ended June 30, 2018
Electric Operations	$	1,100	$	180	n/a
Gas Distribution	234		47		n/a
Adjustments/Eliminations	—		—		$	150
Consolidated Total	$	1,334	$	227	$	150

Three Months Ended June 30, 2017
Electric Operations	$	680	$	247	n/a
Gas Distribution	76		—		n/a
Adjustments/Eliminations	—		—		$	123
Consolidated Total	$	756	$	247	$	123
Six Months Ended June 30, 2017
Electric Operations	$	1,259	$	429	n/a
Gas Distribution	217		44		n/a
Adjustments/Eliminations	—		—		$	231
Consolidated Total	$	1,476	$	473	$	231

Segment Assets	The Company				Consolidated SCE&G
	June 30,		December 31,		June 30,		December 31,
Millions of dollars	2018		2017		2018		2017
Electric Operations	$	12,082	$	11,979	$	12,082	$	11,979
Gas Distribution	3,292		3,259		895		869
Gas Marketing	214		230		n/a		n/a
All Other	1,039		1,042		n/a		n/a
Adjustments/Eliminations	2,274		2,229		3,298		3,098
Consolidated Total	$	18,901	$	18,739	$	16,275	$	15,946