INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2018

Investments, Owned, Federal Income Tax Note [Line Items]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

:

	The Company									Consolidated SCE&G
Millions of dollars	2018			2017			2016			2018			2017			2016
Current taxes (benefit):
Federal	$	(8	)	$	(414	)	$	36		$	(16	)	$	(410	)	$	50
State	5			18			13			—			(18		)	13
Total current taxes (benefit)	(3		)	(396		)	49			(16		)	(428		)	63
Deferred tax (benefit) expense, net:
Federal	(352		)	323			203			(346		)	261			167
State	(55		)	(37		)	21			(52		)	(2		)	20
Total deferred taxes (benefit)	(407		)	286			224			(398		)	259			187
Investment tax credits:
Amortization of amounts deferred-federal	(2		)	(2		)	(2		)	(2		)	(2		)	(2		)
Total income tax expense (benefit)	$	(412	)	$	(112	)	$	271		$	(416	)	$	(171	)	$	248

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

:

	The Company									Consolidated SCE&G
Millions of dollars	2018			2017			2016			2018			2017			2016
U.S. statutory rate	21		%	35		%	35		%	21		%	35		%	35		%
Net income (loss)	$	(528	)	$	(119	)	$	595		$	(614	)	$	(185	)	$	513
Income tax expense (benefit)	(412		)	(112		)	271			(416		)	(171		)	248
Noncontrolling interest	—			—			—			25			13			13
Total pre-tax income (loss)	$	(940	)	$	(231	)	$	866		$	(1,005	)	$	(343	)	$	774
Income taxes (benefit) on above at statutory federal income tax rate	$	(197	)	$	(81	)	$	303		$	(211	)	$	(120	)	$	271
Increases (decreases) attributed to:
State income taxes (less federal income tax effect)	(37		)	(7		)	27			(38		)	(8		)	26
State investment tax credits (less federal income tax effect)	(3		)	(5		)	(5		)	(3		)	(5		)	(5		)
Allowance for equity funds used during construction	(4		)	(8		)	(10		)	(2		)	(5		)	(9		)
Deductible dividends—401(k) Retirement Savings Plan	(2		)	(9		)	(10		)	—			—			—
Amortization of federal investment tax credits	(2		)	(2		)	(2		)	(2		)	(2		)	(2		)
Section 45 tax credits	(9		)	(8		)	(8		)	(9		)	(8		)	(8		)
Domestic production activities deduction	—			(18		)	(23		)	—			(18		)	(23		)
Remeasurement of deferred taxes in connection with enactment of Tax Act	(188		)	30			—			(176		)	(1		)	—
Nuclear Project impairment	23			—			—			23			—			—
Nondeductible merger-related costs	5			—			—			—			—			—
Other differences, net	2			(4		)	(1		)	2			(4		)	(2		)
Total income tax expense (benefit)	$	(412	)	$	(112	)	$	271		$	(416	)	$	(171	)	$	248

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

:

	The Company				Consolidated SCE&G
Millions of dollars	2018		2017		2018		2017
Deferred tax assets:
Net operating loss and tax credit carryforward	$	539	$	600	$	493	$	541
Toshiba settlement	274		273		274		273
Nondeductible accruals	84		88		40		42
Asset retirement obligation, including nuclear decommissioning	143		141		135		132
Regulatory liability, non-property accumulated deferred income tax	—		54		—		54
Financial instruments	10		15		—		—
Unamortized investment tax credits	7		8		7		8
Other	4		6		5		5
Total deferred tax assets	1,061		1,185		954		1,055
Deferred tax liabilities:
Property, plant and equipment	1,227		1,220		1,033		1,035
Regulatory asset, unrecovered nuclear plant costs	668		962		668		962
Deferred employee benefit plan costs	60		60		53		53
Regulatory asset, asset retirement obligation	94		91		88		85
Regulatory asset, other unrecovered plant	24		27		24		27
Demand side management costs	16		16		16		16
Prepayments	21		21		20		19
Other	63		49		41		31
Total deferred tax liabilities	2,173		2,446		1,943		2,228
Net deferred tax liabilities	$	1,112	$	1,261	$	989	$	1,173

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	The Company							Consolidated SCE&G
Millions of dollars	2018		2017			2016		2018		2017			2016
Unrecognized tax benefits, January 1	$	98	$	350		$	49	$	98	$	350		$	49
Gross increases—uncertain tax positions in prior period	8		—			94		8		—			94
Gross decreases—uncertain tax positions in prior period	—		(273		)	—		—		(273		)	—
Gross increases—current period uncertain tax positions	—		21			207		—		21			207
Unrecognized tax benefits, December 31	$	106	$	98		$	350	$	106	$	98		$	350

Summary of Tax Credit Carryforwards [Table Text Block]

The federal and state tax credits and NOL carryforwards are presented below:

	December 31, 2018
Millions of dollars	The Company		Consolidated SCE&G		Expiration Year
Federal NOL Carryforwards	$	1,807	$	1,642	2037
Federal Tax Credits	83		83		2035	-	2038
State NOL Carryforwards	2,447		2,198		2037
State Tax Credits	30		30		2026	-	2033
Total Tax Credits and NOL Carryforwards	$	4,367	$	3,953

SCE&G

Investments, Owned, Federal Income Tax Note [Line Items]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

:

	The Company									Consolidated SCE&G
Millions of dollars	2018			2017			2016			2018			2017			2016
Current taxes (benefit):
Federal	$	(8	)	$	(414	)	$	36		$	(16	)	$	(410	)	$	50
State	5			18			13			—			(18		)	13
Total current taxes (benefit)	(3		)	(396		)	49			(16		)	(428		)	63
Deferred tax (benefit) expense, net:
Federal	(352		)	323			203			(346		)	261			167
State	(55		)	(37		)	21			(52		)	(2		)	20
Total deferred taxes (benefit)	(407		)	286			224			(398		)	259			187
Investment tax credits:
Amortization of amounts deferred-federal	(2		)	(2		)	(2		)	(2		)	(2		)	(2		)
Total income tax expense (benefit)	$	(412	)	$	(112	)	$	271		$	(416	)	$	(171	)	$	248

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	The Company									Consolidated SCE&G
Millions of dollars	2018			2017			2016			2018			2017			2016
U.S. statutory rate	21		%	35		%	35		%	21		%	35		%	35		%
Net income (loss)	$	(528	)	$	(119	)	$	595		$	(614	)	$	(185	)	$	513
Income tax expense (benefit)	(412		)	(112		)	271			(416		)	(171		)	248
Noncontrolling interest	—			—			—			25			13			13
Total pre-tax income (loss)	$	(940	)	$	(231	)	$	866		$	(1,005	)	$	(343	)	$	774
Income taxes (benefit) on above at statutory federal income tax rate	$	(197	)	$	(81	)	$	303		$	(211	)	$	(120	)	$	271
Increases (decreases) attributed to:
State income taxes (less federal income tax effect)	(37		)	(7		)	27			(38		)	(8		)	26
State investment tax credits (less federal income tax effect)	(3		)	(5		)	(5		)	(3		)	(5		)	(5		)
Allowance for equity funds used during construction	(4		)	(8		)	(10		)	(2		)	(5		)	(9		)
Deductible dividends—401(k) Retirement Savings Plan	(2		)	(9		)	(10		)	—			—			—
Amortization of federal investment tax credits	(2		)	(2		)	(2		)	(2		)	(2		)	(2		)
Section 45 tax credits	(9		)	(8		)	(8		)	(9		)	(8		)	(8		)
Domestic production activities deduction	—			(18		)	(23		)	—			(18		)	(23		)
Remeasurement of deferred taxes in connection with enactment of Tax Act	(188		)	30			—			(176		)	(1		)	—
Nuclear Project impairment	23			—			—			23			—			—
Nondeductible merger-related costs	5			—			—			—			—			—
Other differences, net	2			(4		)	(1		)	2			(4		)	(2		)
Total income tax expense (benefit)	$	(412	)	$	(112	)	$	271		$	(416	)	$	(171	)	$	248

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	The Company				Consolidated SCE&G
Millions of dollars	2018		2017		2018		2017
Deferred tax assets:
Net operating loss and tax credit carryforward	$	539	$	600	$	493	$	541
Toshiba settlement	274		273		274		273
Nondeductible accruals	84		88		40		42
Asset retirement obligation, including nuclear decommissioning	143		141		135		132
Regulatory liability, non-property accumulated deferred income tax	—		54		—		54
Financial instruments	10		15		—		—
Unamortized investment tax credits	7		8		7		8
Other	4		6		5		5
Total deferred tax assets	1,061		1,185		954		1,055
Deferred tax liabilities:
Property, plant and equipment	1,227		1,220		1,033		1,035
Regulatory asset, unrecovered nuclear plant costs	668		962		668		962
Deferred employee benefit plan costs	60		60		53		53
Regulatory asset, asset retirement obligation	94		91		88		85
Regulatory asset, other unrecovered plant	24		27		24		27
Demand side management costs	16		16		16		16
Prepayments	21		21		20		19
Other	63		49		41		31
Total deferred tax liabilities	2,173		2,446		1,943		2,228
Net deferred tax liabilities	$	1,112	$	1,261	$	989	$	1,173

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

	The Company							Consolidated SCE&G
Millions of dollars	2018		2017			2016		2018		2017			2016
Unrecognized tax benefits, January 1	$	98	$	350		$	49	$	98	$	350		$	49
Gross increases—uncertain tax positions in prior period	8		—			94		8		—			94
Gross decreases—uncertain tax positions in prior period	—		(273		)	—		—		(273		)	—
Gross increases—current period uncertain tax positions	—		21			207		—		21			207
Unrecognized tax benefits, December 31	$	106	$	98		$	350	$	106	$	98		$	350

Summary of Tax Credit Carryforwards [Table Text Block]

The federal and state tax credits and NOL carryforwards are presented below:

	December 31, 2018
Millions of dollars	The Company		Consolidated SCE&G		Expiration Year
Federal NOL Carryforwards	$	1,807	$	1,642	2037
Federal Tax Credits	83		83		2035	-	2038
State NOL Carryforwards	2,447		2,198		2037
State Tax Credits	30		30		2026	-	2033
Total Tax Credits and NOL Carryforwards	$	4,367	$	3,953