[Line Items] for A schedule of the asset retirement obligations.

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- Definition

The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 25
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=116646717&loc=d3e6290-110844

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

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- Definition

The amount for the individual regulatory liability as itemized in a table of regulatory liabilities as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 980
-SubTopic 405
-Section 25
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394

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Asset Retirement Obligations - NPC - Asset Retirement Obligation by Type (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	$ 7,369	$ 7,214
Asset retirement obligations	1,328	1,340	$ 1,341
Other
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	118	109
Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	2,578	2,424
NPC
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	1,138	1,149
Asset retirement obligations	59	68	$ 72
NPC \| Waste water remediation
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	31	37
NPC \| Evaporative ponds and dry ash landfills
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	14	13
NPC \| Solar-powered generating facilities
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	3	3
NPC \| Other
Asset Retirement Obligations By Type [Line Items]
Asset retirement obligations	11	15
NPC \| Cost of removal
Asset Retirement Obligations By Type [Line Items]
Regulatory liabilities	$ 358	$ 348