CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Operating Revenues:
Electric Domestic Regulated Revenue	$ 817	$ 742	$ 2,035	$ 2,008
Regulated Operating Revenue, Gas	111	112	538	610
Gas-nonregulated	165	214	598	805
Regulated and Unregulated Operating Revenue	1,093	1,068	3,171	3,423
Operating Expenses [Abstract]
Fuel used in electric generation	176	187	443	525
Purchased power	21	14	50	38
Gas purchased for resale	202	260	752	1,030
Other operation and maintenance	187	182	558	527
Depreciation and amortization	93	75	276	267
Other taxes	66	58	192	176
Total Operating Expenses	745	776	2,271	2,563
Gain (Loss) on Disposition of Regulated Business Net of Transaction Costs	0	0	0	235
Operating Income	348	292	900	1,095
Other Income (Expense):
Other income	15	19	46	56
Other expense	(7)	(16)	(31)	(44)
Gain (Loss) On Disposition Of Unregulated Business Net Of Transaction Costs	0	0	0	107
Interest Expense	(88)	(81)	(255)	(236)
Allowance for equity funds used during construction	7	8	22	20
Total Other Expense	(73)	(70)	(218)	(97)
Income Before Income Tax Expense	275	222	682	998
Income Tax Expense	86	73	211	350
Net Income	$ 189	$ 149	$ 471	$ 648
Earnings Per Share, Basic and Diluted	$ 1.32	$ 1.04	$ 3.29	$ 4.53
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			$ 247	$ 234
Common Stock, Dividends, Per Share, Declared	$ 0.575	$ 0.545	$ 1.725	$ 1.635
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	$ 818	$ 743	$ 2,039	$ 2,013
Regulated Operating Revenue, Gas	64	63	253	275
Regulated Operating Revenue	882	806	2,292	2,288
Operating Expenses [Abstract]
Fuel used in electric generation	176	187	443	525
Purchased power	21	14	50	38
Gas purchased for resale	36	37	126	151
Other operation and maintenance	152	148	454	428
Depreciation and amortization	76	59	225	220
Other taxes	62	54	178	163
Total Operating Expenses	523	499	1,476	1,525
Operating Income	359	307	816	763
Other Income (Expense):
Other income	7	6	20	24
Other expense	(4)	(7)	(19)	(21)
Interest Expense	(70)	(63)	(201)	(183)
Allowance for equity funds used during construction	6	8	19	18
Total Other Expense	(61)	(56)	(181)	(162)
Income Before Income Tax Expense	298	251	635	601
Income Tax Expense	94	84	202	196
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	204	167	433	405
Net Income (Loss) Attributable to Noncontrolling Interest	(3)	(3)	(10)	(11)
Earnings Available to Common Shareholder	201	164	423	394
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock	$ 76	$ 71	$ 225	$ 211