CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Revenues:
Electric Domestic Regulated Revenue	$ 2,551	$ 2,622	$ 2,423
Regulated Operating Revenue, Gas	811	1,028	955
Gas-nonregulated	1,018	1,301	1,117
Regulated and Unregulated Operating Revenue	4,380	4,951	4,495
Operating Expenses [Abstract]
Fuel used in electric generation	660	793	745
Purchased power	52	81	43
Gas purchased for resale	1,287	1,729	1,491
Other operation and maintenance	715	728	708
Depreciation and amortization	358	384	378
Other taxes	234	229	220
Total Operating Expenses	3,306	3,944	3,585
Gain (Loss) On Disposition Of Regulated Business Net Of Transaction Costs	234	0	0
Operating Income	1,308	1,007	910
Other Income (Expense):
Other income	75	122	100
Other expenses	(60)	(64)	(46)
Gain (Loss) On Disposition Of Unregulated Business Net Of Transaction Costs	107	0	0
Interest charges, net of allowance for borrowed funds used during construction	(318)	(312)	(297)
Allowance for equity funds used during construction	27	33	27
Total Other Expense	(169)	(221)	(216)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	1,139	786	694
Income Tax Expense (Benefit)	393	248	223
Income Available to Common Shareholders	$ 746	$ 538	$ 471
Per Common Share Data
Earnings Per Share, Basic	$ 5.22	$ 3.79	$ 3.40
Earnings Per Share, Diluted	$ 5.22	$ 3.79	$ 3.39
Weighted Average Common Shares Outstanding (millions)
Weighted Average Number of Shares Outstanding, Basic	142.9	141.9	138.7
Weighted Average Number of Shares Outstanding, Diluted	142.9	141.9	139.1
Dividends Declared Per Share of Common Stock (in dollars per share)	$ 2.18	$ 2.10	$ 2.03
SCE&G
Operating Revenues:
Electric Domestic Regulated Revenue	$ 2,557	$ 2,629	$ 2,431
Regulated Operating Revenue, Gas	373	462	414
Regulated Operating Revenue	2,930	3,091	2,845
Operating Expenses [Abstract]
Fuel used in electric generation	661	799	751
Purchased power	52	81	43
Gas purchased for resale	193	283	244
Other operation and maintenance	579	575	557
Depreciation and amortization	294	315	313
Other taxes	217	208	200
Total Operating Expenses	1,996	2,261	2,108
Operating Income	934	830	737
Other Income (Expense):
Other income	31	80	53
Other expenses	(31)	(34)	(18)
Interest charges, net of allowance for borrowed funds used during construction	(248)	(228)	(217)
Allowance for equity funds used during construction	25	28	25
Total Other Expense	(223)	(154)	(157)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	711	676	580
Income Tax Expense (Benefit)	231	218	189
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	480	458	391
Net Income (Loss) Attributable to Noncontrolling Interest	14	12	11
Earnings Available to Common Shareholder	466	446	380
Dividends Common Stock Declared	$ 285	$ 272	$ 257