Derivative Instruments (Tables) - SCE

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosures [Line Items]

Schedule of Derivative Liabilities in Statement of Financial Position, Fair Value

The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:

	December 31, 2018
	Derivative Assets						Derivative Liabilities								Net Asset
(in millions)	Short-Term		Long-Term		Subtotal		Short-Term			Long-Term		Subtotal
Commodity derivative contracts
Gross amounts recognized	$	171	$	2	$	173	$	13		$	—	$	13		$	160
Gross amounts offset in the consolidated balance sheets	—		—		—		—			—		—			—
Cash collateral posted	—		—		—		(7		)	—		(7		)	7
Net amounts presented in the consolidated balance sheets	$	171	$	2	$	173	$	6		$	—	$	6		$	167

	December 31, 2017
	Derivative Assets								Derivative Liabilities								Net Asset
(in millions)	Short-Term			Long-Term		Subtotal			Short-Term			Long-Term		Subtotal
Commodity derivative contracts
Gross amounts recognized	$	106		$	5	$	111		$	3		$	—	$	3		$	108
Gross amounts offset in the consolidated balance sheets	(1		)	—		(1		)	(1		)	—		(1		)	—
Cash collateral posted	—			—		—			(1		)	—		(1		)	1
Net amounts presented in the consolidated balance sheets	$	105		$	5	$	110		$	1		$	—	$	1		$	109

Schedule of Derivative Assets in Statement of Financial Position, Fair Value

The following table summarizes the gross and net fair values of SCE's commodity derivative instruments:

	December 31, 2018
	Derivative Assets						Derivative Liabilities								Net Asset
(in millions)	Short-Term		Long-Term		Subtotal		Short-Term			Long-Term		Subtotal
Commodity derivative contracts
Gross amounts recognized	$	171	$	2	$	173	$	13		$	—	$	13		$	160
Gross amounts offset in the consolidated balance sheets	—		—		—		—			—		—			—
Cash collateral posted	—		—		—		(7		)	—		(7		)	7
Net amounts presented in the consolidated balance sheets	$	171	$	2	$	173	$	6		$	—	$	6		$	167

	December 31, 2017
	Derivative Assets								Derivative Liabilities								Net Asset
(in millions)	Short-Term			Long-Term		Subtotal			Short-Term			Long-Term		Subtotal
Commodity derivative contracts
Gross amounts recognized	$	106		$	5	$	111		$	3		$	—	$	3		$	108
Gross amounts offset in the consolidated balance sheets	(1		)	—		(1		)	(1		)	—		(1		)	—
Cash collateral posted	—			—		—			(1		)	—		(1		)	1
Net amounts presented in the consolidated balance sheets	$	105		$	5	$	110		$	1		$	—	$	1		$	109

Components of Economic Hedging Activity

The following table summarizes the components of SCE's economic hedging activity:

	Years ended December 31,
(in millions)	2018		2017			2016
Realized gains (losses)	$	26	$	(14	)	$	(59	)
Unrealized gains	82		106			84

Notional Volumes of Derivative Instruments

The following table summarizes the notional volumes of derivatives used for SCE economic hedging activities:

		Economic Hedges
	Unit of	December 31,
Commodity	Measure	2018	2017
Electricity options, swaps and forwards	GWh	2,786	475
Natural gas options, swaps and forwards	Bcf	20	143
Congestion revenue rights	GWh	54,453	78,765