Balance Sheet Components (Tables)

6 Months Ended

Jun. 30, 2019

Schedule of Other Current Assets [Table Text Block]

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



	June 30, 2019		December 31, 2018
Prepaid expenses	$	35	$	54
Assets from price risk management activities	20		20
Margin deposits	5		16
Other	9		—
Other current assets	$	69	$	90

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

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



	June 30, 2019			December 31, 2018
Electric utility plant	$	10,684		$	10,344
Construction work-in-progress	219			346
Total cost	10,903			10,690
Less: accumulated depreciation and amortization	(3,951		)	(3,803		)
Electric utility plant, net	$	6,952		$	6,887

Schedule of Regulatory Assets and Liabilities [Text Block]

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



	June 30, 2019					December 31, 2018
	Current			Noncurrent		Current			Noncurrent
Regulatory assets:
Price risk management	$	20		$	73	$	32		$	99
Pension and other postretirement plans	—			217		—			222
Debt issuance costs	—			19		—			16
Trojan decommissioning activities	—			25		—			26
Other	17			46		29			38
Total regulatory assets	$	37		$	380	$	61		$	401
Regulatory liabilities:
Asset retirement removal costs	$	—		$	1,001	$	—		$	979
Deferred income taxes	—			265		—			267
Trojan decommissioning activities	2			—		1			—
Asset retirement obligations	—			54		—			53
Tax Reform Deferral⁽¹⁾	22			12		23			22
Other	13			33		12			34
Total regulatory liabilities	$	37	⁽²⁾	$	1,365	$	36	⁽²⁾	$	1,355

(1) Related to the deferral of the 2018 net tax benefits due to the change in corporate tax rate under TCJA, including interest.

(2) 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, 2019		December 31, 2018
Accrued employee compensation and benefits	$	58	$	66
Accrued taxes payable	29		34
Accrued interest payable	25		27
Accrued dividends payable	35		34
Regulatory liabilities—current	37		36
Other	63		71
Total accrued expenses and other current liabilities	$	247	$	268

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,
	2019			2018			2019			2018
Service cost	$	4		$	5		$	8		$	10
Interest cost*	9			8			17			16
Expected return on plan assets*	(10		)	(11		)	(20		)	(21		)
Amortization of net actuarial loss*	2			4			5			8
Net periodic benefit cost	$	5		$	6		$	10		$	13

* The 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.