SEGMENT OF BUSINESS INFORMATION (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting Information [Line Items]

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

Disclosure of Reportable Segments 

The Company:

Millions of dollars	Electric Operations			Gas Distribution		Gas Marketing		All Other			Adjustments/ Eliminations			Consolidated Total
2017
External Revenue	$	2,659		$	874	$	874	—			—			$	4,407
Intersegment Revenue	5			2		127		$	389		$	(523	)	—
Operating Income (Loss)	(161		)	186		n/a		—			51			76
Interest Expense	19			28		1		—			315			363
Depreciation and Amortization	295			85		2		16			(16		)	382
Income Tax Expense (Benefit)	8			41		25		(7		)	(179		)	(112		)
Net Income (Loss)	n/a			n/a		27		(46		)	(100		)	(119		)
Segment Assets	11,979			3,259		230		1,042			2,229			18,739
Expenditures for Assets	207			417		2		7			592			1,225
Deferred Tax Assets	6			25		9		—			(40		)	—
2016
External Revenue	$	2,614		$	788	$	825	—			—			$	4,227
Intersegment Revenue	5			2		111		$	414		$	(532	)	—
Operating Income	957			148		n/a		—			48			1,153
Interest Expense	17			25		1		—			299			342
Depreciation and Amortization	287			82		2		16			(16		)	371
Income Tax Expense	8			32		19		—			212			271
Net Income (Loss)	n/a			n/a		30		(18		)	583			595
Segment Assets	11,929			2,892		230		1,124			2,532			18,707
Expenditures for Assets	1,275			276		2		11			15			1,579
Deferred Tax Assets	9			32		11		—			(52		)	—
2015
External Revenue	$	2,551		$	810	$	1,018	$	5		$	(4	)	$	4,380
Intersegment Revenue	6			2		128		413			(549		)	—
Operating Income	876			152		n/a		236			44			1,308

Interest Expense	17	23	1	1	276		318
Depreciation and Amortization	277	77	2	16	(14	)	358
Income Tax Expense	9	32	18	1	333		393
Net Income (Loss)	n/a	n/a	28	185	533		746
Segment Assets	10,883	2,606	201	998	2,458		17,146
Expenditures for Assets	1,087	203	2	15	(154	)	1,153
Deferred Tax Assets	5	29	15	—	(49	)	—

SCE&G

Segment Reporting Information [Line Items]

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

Consolidated SCE&G:

Millions of dollars	Electric Operations			Gas Distribution		Adjustments/ Eliminations			Consolidated Total
2017
External Revenue	$	2,664		$	406	—			$	3,070
Operating Income (Loss)	(161		)	71		—			(90		)
Interest Expense	19			—		$	269		288
Depreciation and Amortization	295			30		(13		)	312
Segment Assets	11,979			869		3,098			15,946
Expenditures for Assets	207			65		656			928
Deferred Tax Assets	6			n/a		(6		)	—
2016
External Revenue	$	2,619		$	367	—			$	2,986
Operating Income	957			56		—			1,013
Interest Expense	17			—		$	253		270
Depreciation and Amortization	287			28		(13		)	302
Segment Assets	11,929			825		3,337			16,091
Expenditures for Assets	1,275			78		46			1,399
Deferred Tax Assets	9			n/a		(9		)	—
2015
External Revenue	$	2,557		$	373	—			$	2,930
Operating Income	876			58		—			934
Interest Expense	17			—		$	231		248
Depreciation and Amortization	277			28		(11		)	294
Segment Assets	10,883			757		3,125			14,765
Expenditures for Assets	1,087			57		(136		)	1,008
Deferred Tax Assets	5			n/a		(5		)	—