CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating Revenues:
Electric Domestic Regulated Revenue	$ 626	$ 638	$ 1,217	$ 1,266
Regulated Operating Revenue, Gas	127	130	426	499
Gas-nonregulated	152	199	434	591
Regulated and Unregulated Operating Revenue	905	967	2,077	2,356
Operating Expenses [Abstract]
Fuel used in electric generation	130	164	267	338
Purchased power	17	11	29	24
Gas purchased for resale	192	247	551	770
Other operation and maintenance	191	173	371	346
Depreciation and amortization	92	97	183	193
Other taxes	62	59	125	118
Total Operating Expenses	684	751	1,526	1,789
Gain (Loss) on Disposition of Regulated Business Net of Transaction Costs	0	0	0	235
Operating Income	221	216	551	802
Other Income (Expense):
Other income	14	18	30	37
Other expense	(10)	(15)	(24)	(27)
Gain (Loss) On Disposition Of Unregulated Business Net Of Transaction Costs	0	0	0	107
Interest Expense	(83)	(78)	(166)	(155)
Allowance for equity funds used during construction	9	7	15	12
Total Other Expense	(70)	(68)	(145)	(26)
Income Before Income Tax Expense	151	148	406	776
Income Tax Expense	46	49	125	277
Net Income	$ 105	$ 99	$ 281	$ 499
Earnings Per Share, Basic and Diluted	$ 0.74	$ 0.69	$ 1.97	$ 3.49
Per Common Share Data
Weighted Average Number of Shares Outstanding, Basic and Diluted	142.9	142.9	142.9	142.9
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock			$ 164	$ 156
Common Stock, Dividends, Per Share, Declared	$ 0.575	$ 0.545	$ 1.150	$ 1.090
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	$ 627	$ 639	$ 1,220	$ 1,269
Regulated Operating Revenue, Gas	65	70	189	212
Regulated Operating Revenue	692	709	1,409	1,481
Operating Expenses [Abstract]
Fuel used in electric generation	130	164	267	338
Purchased power	17	11	29	24
Gas purchased for resale	34	40	89	114
Other operation and maintenance	156	141	302	280
Depreciation and amortization	75	81	149	161
Other taxes	58	54	115	109
Total Operating Expenses	470	491	951	1,026
Operating Income	222	218	458	455
Other Income (Expense):
Other income	6	9	12	18
Other expense	(6)	(7)	(14)	(14)
Interest Expense	(65)	(60)	(131)	(120)
Allowance for equity funds used during construction	8	6	12	11
Total Other Expense	(57)	(52)	(121)	(105)
Income Before Income Tax Expense	165	166	337	350
Income Tax Expense	52	55	108	113
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	113	111	229	237
Net Income (Loss) Attributable to Noncontrolling Interest	(3)	(4)	(6)	(7)
Earnings Available to Common Shareholder	110	107	223	230
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock	$ 75	$ 70	$ 149	$ 140