Balance Sheet Components (Tables)

12 Months Ended

Dec. 31, 2021

Balance Sheet Components [Abstract]

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

The following is the activity in the allowance for uncollectible accounts (in millions):

	Years Ended December 31,
	2021		2020		2019
Balance as of beginning of year	$	16	$	5	$	15
Increase in provision *	35		15		2
Amounts written off, less recoveries	(25)		(4)		(12)
Balance as of end of year	$	26	$	16	$	5

Schedule of Other Assets and Other Liabilities [Table Text Block]

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

	As of December 31,
	2021		2020
Other current assets:
Prepaid expenses	$	66	$	57
Margin deposits	37		8
Assets from price risk management activities	102		33
	$	205	$	98
Accrued expenses and other current liabilities:
Regulatory liabilities—current	$	106	$	23
Accrued employee compensation and benefits	67		67
Accrued dividends payable	40		38
Accrued interest payable	29		29
Accrued taxes payable	46		36
Margin deposits from wholesale counterparties	58		—
Other	111		129
	$	457	$	322

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

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

	As of December 31,
	2021		2020
Electric utility plant:
Generation	$	4,649	$	4,436
Transmission	1,012		970
Distribution	4,469		4,136
General	914		679
Intangible	794		753
Total in service	11,838		10,974
Accumulated depreciation and amortization	(4,146)		(3,864)
Total in service, net	7,692		7,110
Construction work-in-progress	313		429
Electric utility plant, net	$	8,005	$	7,539