Balance Sheet Components (Tables)

3 Months Ended

Mar. 31, 2024

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,
	2024
Balance as of beginning of period	$	9
Increase in provision	3
Amounts written off	(3)
Recoveries	2
Balance as of end of period	$	11

Schedule of Other Current Assets [Table Text Block]

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

	March 31, 2024		December 31, 2023
Prepaid expenses	$	109	$	68
Assets from price risk management activities	29		22
Margin deposits	65		92
Other current assets	$	203	$	182

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

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

	March 31, 2024		December 31, 2023
Electric utility plant in-service	$	13,881	$	13,329
Construction work-in-progress	628		974
Total cost	14,509		14,303
Less: accumulated depreciation and amortization	(4,846)		(4,757)
Electric utility plant, net	$	9,663	$	9,546

Schedule of Regulatory Assets and Liabilities [Text Block]

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

	March 31, 2024					December 31, 2023
	Current			Noncurrent		Current			Noncurrent
Regulatory assets:
Price risk management	$	108		$	48	$	143		$	63
Reliability contingency events	—			75		—			—
Pension and other postretirement plans	—			104		—			104
Trojan decommissioning activities	—			141		—			139
February 2021 ice storm and damage	12			53		12			55
January 2024 storm and damage	—			48		—			—
2020 Labor Day wildfire	5			22		5			23
Wildfire mitigation	19			13		19			10
Other	33			102		42			98
Total regulatory assets	$	177		$	606	$	221		$	492
Regulatory liabilities:
Asset retirement removal costs	$	—		$	1,178	$	—		$	1,173
Deferred income taxes	—			171		—			177
Clearwater RAC	—			10		—			—
Other	50			47		48			48
Total regulatory liabilities	$	50	*	$	1,406	$	48	*	$	1,398

* 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, 2024		December 31, 2023
Accrued employee compensation and benefits	$	50	$	74
Accrued taxes payable	29		30
Accrued interest payable	58		40
Accrued dividends payable	50		51
Regulatory liabilities—current	50		48
Margin deposits from wholesale counterparties	5		5
Other	114		107
Total accrued expenses and other current liabilities	$	356	$	355

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,
	2024		2023
Service cost	$	3	$	3
Interest cost*	8		9
Expected return on plan assets*	(10)		(11)
Net periodic benefit cost	$	1	$	1

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