CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenues:
Electric Domestic Regulated Revenue	$ 742	$ 739	$ 2,008	$ 2,027
Regulated Operating Revenue, Gas	112	132	610	740
Gas-nonregulated	214	250	805	969
Regulated and Unregulated Operating Revenue	1,068	1,121	3,423	3,736
Operating Expenses [Abstract]
Fuel used in electric generation	187	212	525	636
Purchased power	14	13	38	54
Gas purchased for resale	260	304	1,030	1,291
Other operation and maintenance	182	169	527	523
Depreciation and amortization	75	96	267	286
Other taxes	58	58	176	174
Total Operating Expenses	776	852	2,563	2,964
Gain (Loss) on Disposition of Regulated Business Net of Transaction Costs	0	0	235	0
Operating Income	292	269	1,095	772
Other Income (Expense):
Other income	19	18	56	103
Other expense	(16)	(12)	(44)	(39)
Gain (Loss) On Disposition Of Unregulated Business Net Of Transaction Costs	0	0	107	0
Interest Expense	(81)	(79)	(236)	(231)
Allowance for equity funds used during construction	8	11	20	26
Total Other Expense	(70)	(62)	(97)	(141)
Income Before Income Tax Expense	222	207	998	631
Income Tax Expense	73	63	350	198
Net Income	$ 149	$ 144	$ 648	$ 433
Per Common Share Data
Basic Earnings Per Share of Common Stock (in dollars per share)	$ 1.04	$ 1.01	$ 4.53	$ 3.06
Weighted Average Number of Shares Outstanding, Basic and Diluted	142.9	142.1	142.9	141.6
Weighted Average Common Shares Outstanding (millions)
Common Stock, Dividends, Per Share, Declared	$ 0.545	$ 0.525	$ 1.635	$ 1.575
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	$ 743	$ 740	$ 2,013	$ 2,032
Regulated Operating Revenue, Gas	63	72	275	337
Regulated Operating Revenue	806	812	2,288	2,369
Operating Expenses [Abstract]
Fuel used in electric generation	187	213	525	640
Purchased power	14	13	38	54
Gas purchased for resale	37	46	151	210
Other operation and maintenance	148	136	428	415
Depreciation and amortization	59	79	220	236
Other taxes	54	53	163	158
Total Operating Expenses	499	540	1,525	1,713
Operating Income	307	272	763	656
Other Income (Expense):
Other income	6	9	24	71
Other expense	(7)	(7)	(21)	(19)
Interest Expense	(63)	(57)	(183)	(169)
Allowance for equity funds used during construction	8	10	18	22
Total Other Expense	(56)	(45)	(162)	(95)
Income Before Income Tax Expense	251	227	601	561
Income Tax Expense	84	70	196	178
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	167	157	405	383
Net Income (Loss) Attributable to Noncontrolling Interest	(3)	(3)	(11)	(9)
Earnings Available to Common Shareholder	164	154	394	374
Dividends Common Stock Declared	$ 71	$ 69	$ 211	$ 197