CONSOLIDATED STATEMENTS OF COMMON EQUITY Statement - USD ($) shares in Millions, $ in Millions	Total	AOCI Attributable to Parent [Member]	SCEG	SCEG excluding VIEs [Member]	SCEG and GENCO [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity before Treasury Stock	$ 2,402
Treasury Stock, Value	(12)
Retained Earnings, Appropriated	3,118			$ 2,265
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(53)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(12)
Accumulated Other Comprehensive Income (Loss)	(65)			(3)
Stockholders' Equity Attributable to Noncontrolling Interest					$ 129
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			$ 5,151
Stockholders' Equity Attributable to Parent	$ 5,443
Common Stock, Value, Outstanding				$ 2,760
Shares, Outstanding	143			40
Common Stock, Dividends, Per Share, Declared	$ 0.575
Net Income (Loss) Available to Common Stockholders, Basic	$ 176			$ 113
Net Income (Loss) Attributable to Noncontrolling Interest			3		3
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			116
Dividends			74	72
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders					2
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(5)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Remeasurement and Curtailment Adjustement, Net of Tax	0
Other comprehensive income (loss), unrealized holding gain (loss) net of reclassification to AOCI arising during period, net of tax	2
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	7
Other Comprehensive Income (Loss)	2
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	178			113
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0
Dividends, Common Stock	(82)		(74)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders					2
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(5)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Remeasurement and Curtailment Adjustement, Net of Tax	0
Other comprehensive income (loss), unrealized holding gain (loss) net of reclassification to AOCI arising during period, net of tax	2
Stockholders' Equity before Treasury Stock	2,402
Treasury Stock, Value	(12)
Retained Earnings, Appropriated	3,212			2,306
AOCI before Tax, Attributable to Parent	(7)	$ (5)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(51)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(12)
Accumulated Other Comprehensive Income (Loss)	(63)			$ (3)
Stockholders' Equity Attributable to Noncontrolling Interest					130
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			5,193
Stockholders' Equity Attributable to Parent	$ 5,539
Shares, Outstanding	143			40
AOCI before Tax, Attributable to Parent	$ (7)	(5)
Stockholders' Equity before Treasury Stock	2,402
Treasury Stock, Value	(12)
Retained Earnings, Appropriated	3,384		2,481	$ 2,481
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(36)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(13)
Accumulated Other Comprehensive Income (Loss)	(49)			(3)
Stockholders' Equity Attributable to Noncontrolling Interest			134		134
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			5,472
Stockholders' Equity Attributable to Parent	5,725		5,338
Common Stock, Value, Outstanding	$ 2,390		2,860	$ 2,860
Shares, Outstanding	143			40
Common Stock, Dividends, Per Share, Declared	$ 0.6125
Net Income (Loss) Available to Common Stockholders, Basic	$ 171			$ 109
Net Income (Loss) Attributable to Noncontrolling Interest			3		3
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest			112
Dividends			79	77
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders					2
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(2)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Remeasurement and Curtailment Adjustement, Net of Tax	0
Other comprehensive income (loss), unrealized holding gain (loss) net of reclassification to AOCI arising during period, net of tax	(2)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	0
Other Comprehensive Income (Loss)	(2)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	169			109
Treasury Stock Purchased	(1)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0
Dividends, Common Stock	(87)		(79)
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders					2
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(2)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Remeasurement and Curtailment Adjustement, Net of Tax	0
Other comprehensive income (loss), unrealized holding gain (loss) net of reclassification to AOCI arising during period, net of tax	(2)
Stockholders' Equity before Treasury Stock	2,402
Treasury Stock, Value	(13)
Retained Earnings, Appropriated	3,468		2,513	2,513
AOCI before Tax, Attributable to Parent	0	(2)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax	(38)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(13)
Accumulated Other Comprehensive Income (Loss)	(51)			(3)
Stockholders' Equity Attributable to Noncontrolling Interest			135		$ 135
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest			5,505
Stockholders' Equity Attributable to Parent	5,806		5,370
Common Stock, Value, Outstanding	$ 2,389		$ 2,860	$ 2,860
Shares, Outstanding	143			40
AOCI before Tax, Attributable to Parent	$ 0	$ (2)