Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2024

Balance Sheet Components [Abstract]

Allowance for Credit Losses [Text Block]

The following summarizes activity during 2024 in the allowance for credit losses (in millions):

	Three Months Ended June 30,		Six Months Ended June 30,
Balance as of beginning of period	$	11	$	9
Increase in provision	2		5
Amounts written off	(4)		(6)
Recoveries	2		3
Balance as of end of period	$	11	$	11

Schedule of Other Current Assets [Table Text Block]

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

	June 30, 2024		December 31, 2023
Prepaid expenses	$	83	$	68
Assets from price risk management activities	37		22
Margin deposits	55		92
Other current assets	$	175	$	182

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

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

	June 30, 2024		December 31, 2023
Electric utility plant in-service	$	14,126	$	13,329
Construction work-in-progress	690		974
Total cost	14,816		14,303
Less: accumulated depreciation and amortization	(4,943)		(4,757)
Electric utility plant, net	$	9,873	$	9,546

Schedule of Regulatory Assets and Liabilities [Text Block]

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

	June 30, 2024					December 31, 2023
	Current			Noncurrent		Current			Noncurrent
Regulatory assets:
Price risk management	$	105		$	48	$	143		$	63
Reliability contingency events	—			77		—			—
Pension and other postretirement plans	—			104		—			104
Trojan decommissioning activities	—			142		—			139
February 2021 ice storm and damage	13			50		12			55
January 2024 storm and damage	—			44		—			—
2020 Labor Day wildfire	5			21		5			23
Wildfire mitigation	19			21		19			10
Other	23			110		42			98
Total regulatory assets	$	165		$	617	$	221		$	492
Regulatory liabilities:
Asset retirement removal costs	$	—		$	1,188	$	—		$	1,173
Deferred income taxes	—			167		—			177
Clearwater RAC	—			13		—			—
Other	55			38		48			48
Total regulatory liabilities	$	55	*	$	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):

	June 30, 2024		December 31, 2023
Accrued employee compensation and benefits	$	56	$	74
Accrued taxes payable	28		30
Accrued interest payable	48		40
Accrued dividends payable	53		51
Regulatory liabilities—current	55		48
Other	105		112
Total accrued expenses and other current liabilities	$	345	$	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 June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Service cost	$	3	$	3	$	5	$	6
Interest cost*	8		9		17		18
Expected return on plan assets*	(10)		(11)		(20)		(22)
Net periodic benefit cost	$	1	$	1	$	2	$	2

* 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.