CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Revenues:
Electric Domestic Regulated Revenue	$ 638	$ 610	$ 1,266	$ 1,289
Regulated Operating Revenue, Gas	130	150	499	608
Gas-nonregulated	199	266	591	719
Regulated and Unregulated Operating Revenue	967	1,026	2,356	2,616
Operating Expenses [Abstract]
Fuel used in electric generation	164	211	338	424
Purchased power	11	16	24	41
Gas purchased for resale	247	318	770	987
Other operation and maintenance	173	174	346	354
Depreciation and amortization	97	95	193	190
Other taxes	59	58	118	116
Total Operating Expenses	751	872	1,789	2,112
Gain (Loss) on Disposition of Regulated Business Net of Transaction Costs	0	0	235	0
Operating Income	216	154	802	504
Other Income (Expense):
Other income	18	69	37	85
Other expenses	(15)	(13)	(27)	(27)
Gain (Loss) On Disposition Of Unregulated Business Net Of Transaction Costs	0	0	107	0
Interest Expense	(78)	(76)	(155)	(152)
Allowance for equity funds used during construction	7	8	12	14
Total Other Expense	(68)	(12)	(26)	(80)
Income Before Income Tax Expense	148	142	776	424
Income Tax Expense	49	46	277	135
Net Income	$ 99	$ 96	$ 499	$ 289
Per Common Share Data
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 0.69	$ 0.68	$ 3.49	$ 2.05
Weighted Average Number of Shares Outstanding, Basic and Diluted	142.9	141.7	142.9	141.4
Weighted Average Common Shares Outstanding (millions)
Common Stock, Dividends, Per Share, Declared	$ 0.5450	$ 0.5250	$ 1.0900	$ 1.0500
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	$ 639	$ 612	$ 1,269	$ 1,292
Regulated Operating Revenue, Gas	70	86	212	265
Regulated Operating Revenue	709	698	1,481	1,557
Operating Expenses [Abstract]
Fuel used in electric generation	164	213	338	427
Purchased power	11	16	24	41
Gas purchased for resale	40	55	114	165
Other operation and maintenance	141	138	280	279
Depreciation and amortization	81	79	161	157
Other taxes	54	52	109	105
Total Operating Expenses	491	553	1,026	1,174
Operating Income	218	145	455	383
Other Income (Expense):
Other income	9	59	18	62
Other expenses	(7)	(7)	(14)	(13)
Interest Expense	(60)	(56)	(120)	(112)
Allowance for equity funds used during construction	6	7	11	13
Total Other Expense	(52)	3	(105)	(50)
Income Before Income Tax Expense	166	148	350	333
Income Tax Expense	55	49	113	108
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	111	99	237	225
Net Income (Loss) Attributable to Noncontrolling Interest	(4)	(3)	(7)	(6)
Earnings Available to Common Shareholder	107	96	230	219
Dividends Common Stock Declared	$ 70	$ 64	$ 140	$ 128