v3.10.0.1

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2018

Derivative [Line Items]

Schedule of Nonmonetary Notional Amounts of Outstanding Derivative Positions [Table Text Block]

The Company was party to natural gas derivative contracts outstanding in the following quantities:

		Commodity and Energy Management Contracts (in bcf)
Hedge designation		Gas Distribution			Gas Marketing			Total
As of December 31, 2018
Commodity		6.4			12.9			19.3
Energy Management (a)		—			46.8			46.8
Total (a)		6.4			59.7			66.1
As of December 31, 2017
Commodity		6.4			13.4			19.8
Energy Management (a)		—			41.9			41.9
Total (a)		6.4			55.3			61.7

(a) Includes amounts related to basis swap contracts totaling 5.1 bcf in 2018 and 2.6 bcf in 2017.

Schedule of Derivative Instruments [Table Text Block]

The aggregate notional amounts of the interest rate swaps were as follows:

Interest Rate Swaps
		The Company								Consolidated SCE&G
Millions of dollars		December 31, 2018				December 31, 2017				December 31, 2018				December 31, 2017
Designated as hedging instruments		$	106.8			$	111.2			$	36.4			$	36.4
Not designated as hedging instruments		35.0				735.0				35.0				735.0

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Fair Values of Derivative Instruments
				The Company								Consolidated SCE&G
Millions of dollars		Balance Sheet Location		Asset				Liability				Asset				Liability
As of December 31, 2018
Designated as hedging instruments
Interest rate contracts
		Other current liabilities		—				$	2			—				$	1
		Other deferred credits and other liabilities		—				19				—				7
Commodity contracts
		Prepayments		—				1				—				—
Total				—				$	22			—				$	8
Not designated as hedging instruments
Interest rate contracts
		Other deferred credits and other liabilities		—				$	3			—				$	3
Commodity contracts
		Prepayments		$	1			—				—				—
Energy management contracts
		Prepayments		11				12				—				—
		Other current assets		1				—				—				—
		Other current liabilities		—				1				—				—
		Other deferred debits and other assets		1				—				—				—
Total				$	14			$	16			—				$	3
As of December 31, 2017
Designated as hedging instruments
Interest rate contracts
		Other current liabilities		—				$	3			—				$	1
		Other deferred credits and other liabilities		—				24				—				9
Commodity contracts
		Prepayments		—				2				—				—
		Other current liabilities		—				1				—				—
Total				—				$	30			—				$	10
Not designated as hedging instruments
Interest rate contracts
		Other current assets and current liabilities		$	54			$	1			$	54			$	1
		Other deferred credits and other liabilities		—				4				—				4
Commodity contracts
		Other current assets		1				—				—				—
Energy management contracts
		Prepayments		—				1				—				—
		Other current assets		3				—				—				—
		Other deferred debits and other assets		1				—				—				—
		Other current liabilities		—				2				—				—
Total				$	59			$	8			$	54			$	5

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The effect of derivative instruments on the consolidated statements of operations is as follows: 

The Company and Consolidated SCE&G:		Gain (Loss) Deferred in Regulatory Accounts				Loss Reclassified from Deferred Accounts into Income (Effective Portion)
Millions of dollars		(Effective Portion)				Location		Amount
Year Ended December 31, 2018
Interest rate contracts		$	1			Interest expense		$	(1	)
Year Ended December 31, 2017
Interest rate contracts		$	(2	)		Interest expense		$	(2	)
Year Ended December 31, 2016
Interest rate contracts		—				Interest expense		$	(2	)

The Company:		Gain (Loss) Recognized in OCI, net of tax				Gain (Loss) Reclassified from AOCI into Income, net of tax (Effective Portion)
Millions of dollars		(Effective Portion)				Location		Amount
Year Ended December 31, 2018
Interest rate contracts		$	1			Interest expense		$	(9	)
Commodity contracts		(3		)		Gas purchased for resale		(7		)
Total		$	(2	)				$	(16	)
Year Ended December 31, 2017
Interest rate contracts		—				Interest expense		$	(7	)
Commodity contracts		$	(7	)		Gas purchased for resale		1
Total		$	(7	)				$	(6	)
Year Ended December 31, 2016
Interest rate contracts		$	(1	)		Interest expense		$	(7	)
Commodity contracts		5				Gas purchased for resale		(6		)
Total		$	4					$	(13	)

Derivatives Not Designated as Hedging Instruments [Table Text Block]

Derivatives Not Designated as Hedging Instruments

The Company and Consolidated SCE&G:		Gain (Loss) Deferred in				Gain (Loss) Reclassified from Deferred Accounts into Income
Millions of dollars		Regulatory Accounts				Location		Amount
Year Ended December 31, 2018
Interest rate contracts		$	64			Interest Expense		$	(2	)
Interest rate contracts						Other Income		115
Year Ended December 31, 2017
Interest rate contracts		$	(32	)		Interest Expense		$	(3	)
Interest rate contracts						Impairment Loss		(173		)
Year Ended December 31, 2016
Interest rate contracts		$	(34	)		Other income		$	(2	)

Disclosure of Credit Derivatives [Table Text Block]

		The Company								Consolidated SCE&G
Millions of dollars		December 31, 2018				December 31, 2017				December 31, 2018				December 31, 2017
in Net Liability Position
Aggregate fair value of derivatives in net liability position		$	24.8			$	33.7			$	11.2			$	14.7
Fair value of collateral already posted		24.3				28.9				11.0				10.1
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered		$	0.5			$	4.8			$	0.2			$	4.6
in Net Asset Position
Aggregate fair value of derivatives in net asset position		—				$	53.5			—				$	53.5
Fair value of collateral already posted		—				—				—				—
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered		—				$	53.5			—				$	53.5

Offsetting Assets [Table Text Block]

Information related to the offsetting derivative assets follows:

Derivative Assets		The Company																Consolidated SCE&G
Millions of dollars		Interest Rate Contracts				Commodity Contracts				Energy Management Contracts				Total				Interest Rate Contracts
As of December 31, 2018
Gross Amounts of Recognized Assets		—				$	1			$	13			$	14			—
Gross Amounts Offset in Statement of Financial Position		—				—				(11		)		(11		)		—
Net Amounts Presented in Statement of Financial Position		—				1				2				3				—
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Received		—				—				—				—				—
Net Amount		—				$	1			$	2			$	3			—
Balance sheet location
Prepayments														$	12			—
Other current assets														1				—
Other deferred debits and other assets														1				—
Total														$	14			—
As of December 31, 2017
Gross Amounts of Recognized Assets		$	54			$	1			$	4			$	59			$	54
Gross Amounts Offset in Statement of Financial Position		—				—				—				—				—
Net Amounts Presented in Statement of Financial Position		54				1				4				59				54
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Received		—				—				—				—				—
Net Amount		$	54			$	1			$	4			$	59			$	54
Balance sheet location
Other current assets														$	58			$	54
Other deferred debits and other assets														1				—
Total														$	59			$	54

Offsetting Liabilities [Table Text Block]

Information related to the offsetting of derivative liabilities follows:

Derivative Liabilities		The Company																Consolidated SCE&G
Millions of dollars		Interest Rate Contracts				Commodity Contracts				Energy Management Contracts				Total				Interest Rate Contracts
As of December 31, 2018
Gross Amounts of Recognized Liabilities		$	24			$	1			$	13			$	38			$	11
Gross Amounts Offset in Statement of Financial Position		—				—				(11		)		(11		)		—
Net Amounts Presented in Statement of Financial Position		24				1				2				27				11
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Posted		(24		)		—				—				(24		)		(11		)
Net Amount		—				$	1			$	2			$	3			—
Balance sheet location
Prepayments														$	13			—
Other current liabilities														3				$	1
Other deferred credits and other liabilities														22				10
Total														$	38			$	11

Derivative Liabilities		The Company																Consolidated SCE&G
Millions of dollars		Interest Rate Contracts				Commodity Contracts				Energy Management Contracts				Total				Interest Rate Contracts
As of December 31, 2017
Gross Amounts of Recognized Liabilities		$	32			$	3			$	3			$	38			$	15
Gross Amounts Offset in Statement of Financial Position		—				—				(1		)		(1		)		—
Net Amounts Presented in Statement of Financial Position		32				3				2				37				15
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Posted		(28		)		—				(1		)		(29		)		—
Net Amount		$	4			3				$	1			$	8			$	15
Balance sheet location
Other current assets														$	2			—
Other current liabilities														7				$	2
Other deferred credits and other liabilities														28				13
Total														$	37			$	15

SCE&G

Derivative [Line Items]

Schedule of Derivative Instruments [Table Text Block]

The aggregate notional amounts of the interest rate swaps were as follows:

Interest Rate Swaps
		The Company								Consolidated SCE&G
Millions of dollars		December 31, 2018				December 31, 2017				December 31, 2018				December 31, 2017
Designated as hedging instruments		$	106.8			$	111.2			$	36.4			$	36.4
Not designated as hedging instruments		35.0				735.0				35.0				735.0

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

Fair Values of Derivative Instruments
				The Company								Consolidated SCE&G
Millions of dollars		Balance Sheet Location		Asset				Liability				Asset				Liability
As of December 31, 2018
Designated as hedging instruments
Interest rate contracts
		Other current liabilities		—				$	2			—				$	1
		Other deferred credits and other liabilities		—				19				—				7
Commodity contracts
		Prepayments		—				1				—				—
Total				—				$	22			—				$	8
Not designated as hedging instruments
Interest rate contracts
		Other deferred credits and other liabilities		—				$	3			—				$	3
Commodity contracts
		Prepayments		$	1			—				—				—
Energy management contracts
		Prepayments		11				12				—				—
		Other current assets		1				—				—				—
		Other current liabilities		—				1				—				—
		Other deferred debits and other assets		1				—				—				—
Total				$	14			$	16			—				$	3
As of December 31, 2017
Designated as hedging instruments
Interest rate contracts
		Other current liabilities		—				$	3			—				$	1
		Other deferred credits and other liabilities		—				24				—				9
Commodity contracts
		Prepayments		—				2				—				—
		Other current liabilities		—				1				—				—
Total				—				$	30			—				$	10
Not designated as hedging instruments
Interest rate contracts
		Other current assets and current liabilities		$	54			$	1			$	54			$	1
		Other deferred credits and other liabilities		—				4				—				4
Commodity contracts
		Other current assets		1				—				—				—
Energy management contracts
		Prepayments		—				1				—				—
		Other current assets		3				—				—				—
		Other deferred debits and other assets		1				—				—				—
		Other current liabilities		—				2				—				—
Total				$	59			$	8			$	54			$	5

Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The effect of derivative instruments on the consolidated statements of operations is as follows: 

The Company and Consolidated SCE&G:		Gain (Loss) Deferred in Regulatory Accounts				Loss Reclassified from Deferred Accounts into Income (Effective Portion)
Millions of dollars		(Effective Portion)				Location		Amount
Year Ended December 31, 2018
Interest rate contracts		$	1			Interest expense		$	(1	)
Year Ended December 31, 2017
Interest rate contracts		$	(2	)		Interest expense		$	(2	)
Year Ended December 31, 2016
Interest rate contracts		—				Interest expense		$	(2	)

Derivatives Not Designated as Hedging Instruments [Table Text Block]

Derivatives Not Designated as Hedging Instruments

The Company and Consolidated SCE&G:		Gain (Loss) Deferred in				Gain (Loss) Reclassified from Deferred Accounts into Income
Millions of dollars		Regulatory Accounts				Location		Amount
Year Ended December 31, 2018
Interest rate contracts		$	64			Interest Expense		$	(2	)
Interest rate contracts						Other Income		115
Year Ended December 31, 2017
Interest rate contracts		$	(32	)		Interest Expense		$	(3	)
Interest rate contracts						Impairment Loss		(173		)
Year Ended December 31, 2016
Interest rate contracts		$	(34	)		Other income		$	(2	)

Disclosure of Credit Derivatives [Table Text Block]

		The Company								Consolidated SCE&G
Millions of dollars		December 31, 2018				December 31, 2017				December 31, 2018				December 31, 2017
in Net Liability Position
Aggregate fair value of derivatives in net liability position		$	24.8			$	33.7			$	11.2			$	14.7
Fair value of collateral already posted		24.3				28.9				11.0				10.1
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered		$	0.5			$	4.8			$	0.2			$	4.6
in Net Asset Position
Aggregate fair value of derivatives in net asset position		—				$	53.5			—				$	53.5
Fair value of collateral already posted		—				—				—				—
Additional cash collateral or letters of credit in the event credit-risk-related contingent features were triggered		—				$	53.5			—				$	53.5

Offsetting Assets [Table Text Block]

Information related to the offsetting derivative assets follows:

Derivative Assets		The Company																Consolidated SCE&G
Millions of dollars		Interest Rate Contracts				Commodity Contracts				Energy Management Contracts				Total				Interest Rate Contracts
As of December 31, 2018
Gross Amounts of Recognized Assets		—				$	1			$	13			$	14			—
Gross Amounts Offset in Statement of Financial Position		—				—				(11		)		(11		)		—
Net Amounts Presented in Statement of Financial Position		—				1				2				3				—
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Received		—				—				—				—				—
Net Amount		—				$	1			$	2			$	3			—
Balance sheet location
Prepayments														$	12			—
Other current assets														1				—
Other deferred debits and other assets														1				—
Total														$	14			—
As of December 31, 2017
Gross Amounts of Recognized Assets		$	54			$	1			$	4			$	59			$	54
Gross Amounts Offset in Statement of Financial Position		—				—				—				—				—
Net Amounts Presented in Statement of Financial Position		54				1				4				59				54
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Received		—				—				—				—				—
Net Amount		$	54			$	1			$	4			$	59			$	54
Balance sheet location
Other current assets														$	58			$	54
Other deferred debits and other assets														1				—
Total														$	59			$	54

Offsetting Liabilities [Table Text Block]

Information related to the offsetting of derivative liabilities follows:

Derivative Liabilities		The Company																Consolidated SCE&G
Millions of dollars		Interest Rate Contracts				Commodity Contracts				Energy Management Contracts				Total				Interest Rate Contracts
As of December 31, 2018
Gross Amounts of Recognized Liabilities		$	24			$	1			$	13			$	38			$	11
Gross Amounts Offset in Statement of Financial Position		—				—				(11		)		(11		)		—
Net Amounts Presented in Statement of Financial Position		24				1				2				27				11
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Posted		(24		)		—				—				(24		)		(11		)
Net Amount		—				$	1			$	2			$	3			—
Balance sheet location
Prepayments														$	13			—
Other current liabilities														3				$	1
Other deferred credits and other liabilities														22				10
Total														$	38			$	11

Derivative Liabilities		The Company																Consolidated SCE&G
Millions of dollars		Interest Rate Contracts				Commodity Contracts				Energy Management Contracts				Total				Interest Rate Contracts
As of December 31, 2017
Gross Amounts of Recognized Liabilities		$	32			$	3			$	3			$	38			$	15
Gross Amounts Offset in Statement of Financial Position		—				—				(1		)		(1		)		—
Net Amounts Presented in Statement of Financial Position		32				3				2				37				15
Gross Amounts Not Offset - Financial Instruments		—				—				—				—				—
Gross Amounts Not Offset - Cash Collateral Posted		(28		)		—				(1		)		(29		)		—
Net Amount		$	4			3				$	1			$	8			$	15
Balance sheet location
Other current assets														$	2			—
Other current liabilities														7				$	2
Other deferred credits and other liabilities														28				13
Total														$	37			$	15

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Schedule of Nonmonetary Notional Amounts of Outstanding Derivative Positions [Table Text Block]

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Tabular disclosure of credit derivatives which includes information by sellers of credit derivatives, about each credit derivative, or each group of similar credit derivatives, including (a) the nature of the credit derivative - its term, how it arose, the events or circumstances that would require the seller to perform under the credit derivative, and the current status of the payment/performance risk of the credit derivative; (b) the maximum potential amount of future payments (undiscounted) the seller could be required to make under the credit derivative; (c) the current fair value of the credit derivative; and (d) the nature of any recourse provisions under the credit derivative, and any assets held either as collateral or by third parties. A credit derivative is a derivative instrument (1) in which one or more of its underlyings are related to the credit risk of a specified entity (or a group of entities) or an index based on the credit risk of a group of entities and (2) that exposes the seller to potential loss from credit-risk-related events specified in the contract. Examples of credit derivatives within the scope of this paragraph include, but are not limited to, credit default swaps, credit spread options, and credit index products; also includes a hybrid instrument that has an embedded credit derivative (for example, but not limited to, a credit-linked note).

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