Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2021

Derivative Instruments And Hedging Activities Disclosure [Abstract]

The table below presents derivative balances by type of financial instrument, if the gross amounts recognized in the Consolidated Balance Sheets were netted with derivative instruments and cash collateral received or paid. DESC’s commodity derivative assets are not subject to a master netting agreement or similar arrangement.

	September 30, 2021								December 31, 2020
	Gross Amounts Not Offset in the Consolidated Balance Sheet								Gross Amounts Not Offset in the Consolidated Balance Sheet
(millions)	Gross Liabilities Presented in the Consolidated Balance Sheet⁽¹⁾		Financial Instruments		Cash Collateral Paid		Net Amounts		Gross Liabilities Presented in the Consolidated Balance Sheet⁽¹⁾		Financial Instruments		Cash Collateral Paid		Net Amounts
Interest rate contracts:
Over-the-counter	$	21	$	—	$	11	$	10	$	27	$	—	$	17	$	10
Total derivatives	$	21	$	—	$	11	$	10	$	27	$	—	$	17	$	10

(1)	Excludes $1 million and $— million of commodity derivative liabilities at September 30, 2021 and December 31, 2020, respectively, which are not subject to master netting or similar arrangements.

Schedule of Volume of Derivative Activity

The following table presents the volume of derivative activity at September 30, 2021. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions.

	Current		Noncurrent
Electricity (MWh):
Fixed price		1,756,930		22,928,956
Interest rate⁽¹⁾ (millions)	$	—	$	71

(1)	^{Maturity is determined based on final settlement period.}

Fair Value of Derivatives

The following tables present the fair values of derivatives and where they are presented in the Consolidated Balance Sheets:

(millions)	Fair Value - Derivatives under Hedge Accounting		Fair Value - Derivatives not under Hedge Accounting		Total Fair Value
At September 30, 2021
ASSETS
Current Assets
Commodity	$	—	$	22	$	22
Total current derivative assets⁽¹⁾		—		22		22
Noncurrent Assets
Commodity		—		25		25
Total noncurrent derivative assets⁽²⁾		—		25		25
Total derivative assets	$	—	$	47	$	47
LIABILITIES
Current Liabilities
Interest rate	$	1	$	1	$	2
Total current derivative liabilities⁽³⁾		1		1		2
Noncurrent Liabilities
Commodity		—		1		1
Interest rate		12		7		19
Total noncurrent derivative liabilities⁽⁴⁾		12		8		20
Total derivative liabilities	$	13	$	9	$	22
At December 31, 2020
LIABILITIES
Current Liabilities
Interest rate	$	1	$	1	$	2
Total current derivative liabilities⁽³⁾		1		1		2
Noncurrent Liabilities
Interest rate		15		10		25
Total noncurrent derivative liabilities⁽⁴⁾		15		10		25
Total derivative liabilities	$	16	$	11	$	27

(1)	Current derivative assets are presented in other current assets in the Consolidated Balance Sheets.

(2)	^{Noncurrent derivative assets are presented in other deferred debits and other assets in the Consolidated Balance Sheets.}

(3)	Current derivative liabilities are presented in other current liabilities in the Consolidated Balance Sheets.

(4)	^{Noncurrent derivative liabilities are presented in other deferred credits and other liabilities in the Consolidated Balance Sheets.}

Derivatives in Cash Flow Hedging Relationships

The following tables present the gains and losses on derivatives, as well as where the associated activity is presented in the Consolidated Balance Sheets and Statements of Comprehensive Income:

Derivatives in Cash Flow Hedging Relationships

(millions)	Increase (Decrease) in Derivatives Subject to Regulatory Treatment⁽¹⁾
Three Months Ended September 30, 2021
Derivative type and location of gains (losses):
Interest rate	$	1
Total	$	1
Three Months Ended September 30, 2020
Derivative type and location of gains (losses):
Interest rate	$	2
Total	$	2
Nine Months Ended September 30, 2021
Derivative type and location of gains (losses):
Interest rate	$	7
Total	$	7
Nine Months Ended September 30, 2020
Derivative type and location of gains (losses):
Interest rate	$	(2	)
Total	$	(2	)

(1)	Represents net derivative activity deferred into and amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/ liabilities have no associated effect in the Consolidated Statements of Comprehensive Income.

Derivatives Not Designated as Hedging Instruments

Derivatives Not Designated as Hedging Instrument

(millions)		Amount of Gain (Loss) Recognized in Income on Derivatives⁽¹⁾
Three Months Ended September 30,	Location	2021			2020
Derivative type and location of gains (losses):
Commodity contracts	Purchased power	$	3		$	—
Interest rate contracts	Interest charges		—			—
Total		$	3		$	—
Nine Months Ended September 30,
Derivative type and location of gains (losses):
Commodity contracts	Purchased power	$	3		$	—
Interest rate contracts	Interest charges		(1	)		(1	)
Total		$	2		$	(1	)

(1)	Includes derivative activity amortized out of regulatory assets/liabilities. Amounts deferred into regulatory assets/liabilities have no associated effect in the Consolidated Statements of Comprehensive Income.