CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Operating Revenues:
Electric Domestic Regulated Revenue	$ 552.0	$ 679.0	$ 1,098.0	$ 1,256.0
Regulated Operating Revenue, Gas	148.0	140.0	509.0	461.0
Gas-nonregulated	143.0	182.0	416.0	456.0
Regulated and Unregulated Operating Revenue	843.0	1,001.0	2,023.0	2,173.0
Operating Expenses
Fuel used in electric generation	155.0	161.0	315.0	297.0
Purchased power	15.0	21.0	67.0	32.0
Gas purchased for resale	192.0	227.0	598.0	597.0
Other operation and maintenance	208.0	179.0	410.0	354.0
Utilities Operating Expense, Impairments	0.0		3.6
Depreciation and amortization	100.0	95.0	199.0	189.0
Other taxes	70.0	67.0	140.0	133.0
Total Operating Expenses	740.0	750.0	1,733.0	1,602.0
Operating Income	103.0	251.0	290.0	571.0
Other Nonoperating Income (Expense)	4.0	14.0	133.0	27.0
Other Income (Expense):
Other income	7.0	16.0	136.0	33.0
Other expense	(11.0)	(11.0)	(20.0)	(24.0)
Interest Expense	(95.0)	(88.0)	(192.0)	(175.0)
Allowance for equity funds used during construction			7.0	18.0
Income Before Income Tax Expense	12.0	177.0	231.0	423.0
Income Tax Expense	4.0	56.0	54.0	131.0
Net Income (Loss) Available to Common Stockholders, Basic	$ 8.0	$ 121.0	$ 177.0	$ 292.0
Earnings Per Share, Basic and Diluted	$ 0.06	$ 0.85	$ 1.24	$ 2.04
Per Common Share Data
Weighted Average Number of Shares Outstanding, Basic and Diluted	143	143	143	143
Weighted Average Common Shares Outstanding (millions)
Common Stock, Dividends, Per Share, Declared	$ 0.1237	$ 0.6125	$ 0.7362	$ 1.225
SCEG
Operating Revenues:
Electric Domestic Regulated Revenue	$ 552.0	$ 678.0	$ 1,098.0	$ 1,256.0
Electric Domestic Regulated Revenues - Affiliate	1.0	2.0	2.0	3.0
Regulated Operating Revenue, Gas	79.0	75.0	234.0	216.0
Regulated Operating Revenue Gas, Affiliate		1.0		1.0
Regulated Operating Revenue	632.0	756.0	1,334.0	1,476.0
Operating Expenses
Fuel used in electric generation	126.0	126.0	255.0	239.0
Fuel used in electric generation, affiliate	29.0	35.0	60.0	59.0
Purchased power	15.0	21.0	67.0	32.0
Gas purchased for resale	45.0	42.0	121.0	108.0
Other operation and maintenance	113.0	96.0	215.0	197.0
Other operation and maintenance, affiliate	51.0	50.0	95.0	91.0
Utilities Operating Expense, Impairments			4.0
Depreciation and amortization	81.0	77.0	161.0	154.0
Other taxes	64.0	60.0	126.0	120.0
Other taxes, affiliate	1.0	2.0	3.0	3.0
Total Operating Expenses	525.0	509.0	1,107.0	1,003.0
Operating Income	107.0	247.0	227.0	473.0
Other Nonoperating Income (Expense)	2.0	8.0	125.0	15.0
Other Income (Expense):
Other income	4.0	7.0	130.0	15.0
Other expense	(5.0)	(6.0)	(12.0)	(16.0)
Interest Expense	(76.0)	(69.0)	(152.0)	(138.0)
Allowance for equity funds used during construction			4.0	16.0
Income Before Income Tax Expense	33.0	186.0	200.0	350.0
Income Tax Expense	2.0	60.0	41.0	112.0
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	31.0	126.0	159.0	238.0
Net Income (Loss) Attributable to Noncontrolling Interest	5.0	3.0	9.0	7.0
Earnings Available to Common Shareholder	$ 26.0	$ 123.0	$ 150.0	$ 231.0
Weighted Average Common Shares Outstanding (millions)
Common Stock, Dividends, Per Share, Declared	$ 0	$ 81,000,000