RATE AND OTHER REGULATORY MATTERS (Tables)

12 Months Ended

Dec. 31, 2016

Public Utilities, General Disclosures

Demand reduction programs [Table Text Block]

Year	Effective	Amount
2016	First billing cycle of May	$37.6 million
2015	First billing cycle of May	$32.0 million
2014	First billing cycle of May	$15.4 million

Schedule of Changes in Electric Rate BLRA [Table Text Block]

Year	Increase	Effective for bills rendered on and after	Amount	Allowed ROE
2016	2.7%	November 27	$64.4 million	10.50%	*
2015	2.6%	October 30	$64.5 million	11.00%
2014	2.8%	October 30	$66.2 million	11.00%

Schedule of Changes in Gas Rate RSA [Table Text Block]

Year	Action			Amount
2016	1.2	%	Increase	$4.1 million
2015	No change			—
2014	0.6	%	Decrease	$2.6 million

Schedule of Regulatory Assets [Table Text Block]

.

	The Company				Consolidated SCE&G
	December 31,				December 31,
Millions of dollars	2016		2015		2016		2015
Regulatory Assets:
Accumulated deferred income taxes	$	316	$	298	$	307	$	291
AROs and related funding	425		405		403		384
Deferred employee benefit plan costs	342		325		309		295
Deferred losses on interest rate derivatives	620		535		620		535
Unrecovered plant	117		127		117		127
Environmental remediation costs	32		42		26		35
DSM Programs	59		61		59		61
Pipeline integrity management costs	33		19		6		4
Carrying costs on deferred tax assets related to nuclear construction	32		18		32		18
Deferred storm damage costs	20		—		20		—
Deferred costs related to uncertain tax position	15		—		15		—
Other	119		107		116		107
Total Regulatory Assets	$	2,130	$	1,937	$	2,030	$	1,857

Schedule of Regulatory Liabilities [Table Text Block]

Regulatory Liabilities:
Asset removal costs	$	755	$	732	$	529	$	519
Deferred gains on interest rate derivatives	151		96		151		96
Other	24		27		15		20
Total Regulatory Liabilities	$	930	$	855	$	695	$	635

SCE&G

Public Utilities, General Disclosures

Demand reduction programs [Table Text Block]

Year	Effective	Amount
2016	First billing cycle of May	$37.6 million
2015	First billing cycle of May	$32.0 million
2014	First billing cycle of May	$15.4 million

Schedule of Changes in Electric Rate BLRA [Table Text Block]

Year	Increase	Effective for bills rendered on and after	Amount	Allowed ROE
2016	2.7%	November 27	$64.4 million	10.50%	*
2015	2.6%	October 30	$64.5 million	11.00%
2014	2.8%	October 30	$66.2 million	11.00%

Schedule of Changes in Gas Rate RSA [Table Text Block]

Year	Action			Amount
2016	1.2	%	Increase	$4.1 million
2015	No change			—
2014	0.6	%	Decrease	$2.6 million

Schedule of Regulatory Assets [Table Text Block]

	The Company				Consolidated SCE&G
	December 31,				December 31,
Millions of dollars	2016		2015		2016		2015
Regulatory Assets:
Accumulated deferred income taxes	$	316	$	298	$	307	$	291
AROs and related funding	425		405		403		384
Deferred employee benefit plan costs	342		325		309		295
Deferred losses on interest rate derivatives	620		535		620		535
Unrecovered plant	117		127		117		127
Environmental remediation costs	32		42		26		35
DSM Programs	59		61		59		61
Pipeline integrity management costs	33		19		6		4
Carrying costs on deferred tax assets related to nuclear construction	32		18		32		18
Deferred storm damage costs	20		—		20		—
Deferred costs related to uncertain tax position	15		—		15		—
Other	119		107		116		107
Total Regulatory Assets	$	2,130	$	1,937	$	2,030	$	1,857

Schedule of Regulatory Liabilities [Table Text Block]

Regulatory Liabilities:
Asset removal costs	$	755	$	732	$	529	$	519
Deferred gains on interest rate derivatives	151		96		151		96
Other	24		27		15		20
Total Regulatory Liabilities	$	930	$	855	$	695	$	635