Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2022

Balance Sheet Components [Abstract]

Allowance for Credit Losses [Text Block]

The following summarizes activity in the allowance for credit losses (in millions):

	Three Months Ended March 31,
	2022
Balance as of beginning of period	$	26
Increase in provision	6
Amounts written off	(6)
Recoveries	2
Balance as of end of period	$	28

Schedule of Other Current Assets [Table Text Block]

Other current assets consist of the following (in millions):

	March 31, 2022		December 31, 2021
Prepaid expenses	$	92	$	66
Assets from price risk management activities	265		102
Margin deposits	14		37
Other current assets	$	371	$	205

Schedule of Public Utility Property, Plant, and Equipment [Table Text Block]

Electric utility plant, net consists of the following (in millions):             

	March 31, 2022		December 31, 2021
Electric utility plant	$	11,931	$	11,838
Construction work-in-progress	349		313
Total cost	12,280		12,151
Less: accumulated depreciation and amortization	(4,218)		(4,146)
Electric utility plant, net	$	8,062	$	8,005

Schedule of Regulatory Assets and Liabilities [Text Block]

Regulatory assets and liabilities consist of the following (in millions):

	March 31, 2022					December 31, 2021
	Current			Noncurrent		Current			Noncurrent
Regulatory assets:
Price risk management	$	—		$	8	$	—		$	55
Pension and other postretirement plans	—			128		—			131
Debt issuance costs	—			23		—			23
Trojan decommissioning activities	—			93		—			90
February 2021 ice storm and damage	—			71		—			67
Power cost adjustment mechanism	—			28		—			29
2020 Labor Day wildfire	—			38		—			45
COVID-19	—			35		—			36
Other	20			67		24			57
Total regulatory assets	$	20		$	491	$	24		$	533
Regulatory liabilities:
Asset retirement removal costs	$	—		$	1,063	$	—		$	1,047
Deferred income taxes	—			205		—			208
Asset retirement obligations	—			44		—			43
Price risk management	205			—		55			—
Other	46			67		51			62
Total regulatory liabilities	$	251	*	$	1,379	$	106	*	$	1,360

* Included in Accrued expenses and other current liabilities in the condensed consolidated balance sheets.

Other Liabilities Disclosure [Text Block]

Accrued expenses and other current liabilities consist of the following (in millions):

	March 31, 2022		December 31, 2021
Accrued employee compensation and benefits	$	47	$	67
Accrued taxes payable	37		46
Accrued interest payable	43		29
Accrued dividends payable	40		40
Regulatory liabilities—current	251		106
Margin deposits from wholesale counterparties	157		58
Other	105		111
Total accrued expenses and other current liabilities	$	680	$	457

Pension and Other Postretirement Benefits Disclosure [Text Block]

Components of net periodic benefit cost under the defined benefit pension plan are as follows (in millions):

	Three Months Ended March 31,
	2022		2021
Service cost	$	4	$	5
Interest cost*	7		7
Expected return on plan assets*	(12)		(11)
Amortization of net actuarial loss*	4		5
Net periodic benefit cost	$	3	$	6

* The net expense portion of non-service cost components are included in Miscellaneous income (expense), net within Other income on the Company’s condensed consolidated statements of income and comprehensive income.