RATE AND OTHER REGULATORY MATTERS (Tables)

9 Months Ended

Sep. 30, 2018

Public Utilities, General Disclosures [Line Items]

Pipeline integrity management revenue requirement [Table Text Block]

Rates Effective	Incremental Increase
March 1, 2018	$14.7 million
September 1, 2018	$1.1 million

Schedule of Regulatory Assets [Table Text Block]

	The Company				Consolidated SCE&G
Millions of dollars	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Regulatory Assets:
Unrecovered Nuclear Project costs	$	4,140	$	3,976	$	4,140	$	3,976
AROs and related funding	448		434		423		410
Deferred employee benefit plan costs	282		305		254		273
Deferred losses on interest rate derivatives	446		456		446		456
Other unrecovered plant	96		105		96		105
DSM Programs	57		59		57		59
Pipeline integrity management costs	67		51		9		8
Environmental remediation costs	28		30		24		25
Deferred storm damage costs	29		24		29		24
Deferred transmission operating costs	11		—		11		—
Other	135		140		134		140
Total Regulatory Assets	$	5,739	$	5,580	$	5,623	$	5,476

Schedule of Regulatory Liabilities [Table Text Block]

Regulatory Liabilities:
Monetization of guaranty settlement	$	1,098	$	1,095	$	1,098	$	1,095
Accumulated deferred income taxes	1,075		1,076		916		914
Asset removal costs	775		757		539		527
Deferred gains on interest rate derivatives	77		131		77		131
Other	15		—		5		—
Total Regulatory Liabilities	$	3,040	$	3,059	$	2,635	$	2,667

SCEG

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets [Table Text Block]

	The Company				Consolidated SCE&G
Millions of dollars	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Regulatory Assets:
Unrecovered Nuclear Project costs	$	4,140	$	3,976	$	4,140	$	3,976
AROs and related funding	448		434		423		410
Deferred employee benefit plan costs	282		305		254		273
Deferred losses on interest rate derivatives	446		456		446		456
Other unrecovered plant	96		105		96		105
DSM Programs	57		59		57		59
Pipeline integrity management costs	67		51		9		8
Environmental remediation costs	28		30		24		25
Deferred storm damage costs	29		24		29		24
Deferred transmission operating costs	11		—		11		—
Other	135		140		134		140
Total Regulatory Assets	$	5,739	$	5,580	$	5,623	$	5,476

Schedule of Regulatory Liabilities [Table Text Block]

Regulatory Liabilities:
Monetization of guaranty settlement	$	1,098	$	1,095	$	1,098	$	1,095
Accumulated deferred income taxes	1,075		1,076		916		914
Asset removal costs	775		757		539		527
Deferred gains on interest rate derivatives	77		131		77		131
Other	15		—		5		—
Total Regulatory Liabilities	$	3,040	$	3,059	$	2,635	$	2,667