CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating Revenues:
Electric Domestic Regulated Revenue	$ 592	$ 629
Regulated Operating Revenue, Gas	299	369
Gas-nonregulated	281	391
Regulated and Unregulated Operating Revenue	1,172	1,389
Operating Expenses [Abstract]
Fuel used in electric generation	136	174
Purchased power	11	13
Gas purchased for resale	359	523
Other operation and maintenance	181	173
Depreciation and amortization	91	96
Other taxes	63	59
Total Operating Expenses	841	1,038
Gain (Loss) on Disposition of Regulated Business Net of Transaction Costs	0	235
Operating Income	331	586
Other Income (Expense):
Other income	16	19
Other expense	(14)	(12)
Gain (Loss) On Disposition Of Unregulated Business Net Of Transaction Costs	0	107
Interest Expense	(83)	(77)
Allowance for equity funds used during construction	5	5
Total Other Expense	(76)	42
Income Before Income Tax Expense	255	628
Income Tax Expense	79	228
Net Income	$ 176	$ 400
Earnings Per Share, Basic and Diluted	$ 1.23	$ 2.80
Per Common Share Data
Weighted Average Number of Shares Outstanding, Basic and Diluted	142.9	142.9
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock	$ 82
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	593	$ 630
Regulated Operating Revenue, Gas	124	142
Regulated Operating Revenue	717	772
Operating Expenses [Abstract]
Fuel used in electric generation	136	174
Purchased power	11	13
Gas purchased for resale	56	74
Other operation and maintenance	146	139
Depreciation and amortization	74	80
Other taxes	58	55
Total Operating Expenses	481	535
Operating Income	236	237
Other Income (Expense):
Other income	5	9
Other expense	(8)	(8)
Interest Expense	(66)	(59)
Allowance for equity funds used during construction	5	5
Total Other Expense	(64)	(53)
Income Before Income Tax Expense	172	184
Income Tax Expense	56	58
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	116	126
Net Income (Loss) Attributable to Noncontrolling Interest	(3)	(4)
Earnings Available to Common Shareholder	113	122
Weighted Average Common Shares Outstanding (millions)
Dividends, Common Stock	$ 74	$ 71