Income Taxes - Summary of NOL and Carryforwards (Details) $ in Millions	Dec. 31, 2024 USD ($)
Carryforwards
Loss Carryforwards	$ 3,377
Credit Carryforwards	723
Expire in 2025
Carryforwards
Loss Carryforwards	7
Credit Carryforwards	0
Expire between 2026 to 2029
Carryforwards
Loss Carryforwards	28
Credit Carryforwards	0
Expire between 2030 to 2044
Carryforwards
Loss Carryforwards	1,719
Credit Carryforwards	699
No expiration date
Carryforwards
Loss Carryforwards	1,623
Credit Carryforwards	24
SCE
Carryforwards
Loss Carryforwards	2,253
Credit Carryforwards	316
SCE \| Expire in 2025
Carryforwards
Loss Carryforwards	7
Credit Carryforwards	0
SCE \| Expire between 2026 to 2029
Carryforwards
Loss Carryforwards	12
Credit Carryforwards	0
SCE \| Expire between 2030 to 2044
Carryforwards
Loss Carryforwards	786
Credit Carryforwards	290
SCE \| No expiration date
Carryforwards
Loss Carryforwards	1,448
Credit Carryforwards	$ 26

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-3

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