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Summary of Significant Accounting Policies - Narrative (Details) $ in Millions		3 Months Ended		6 Months Ended
	Nov. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) shares	Jun. 30, 2025 shares	Jun. 30, 2026 USD ($) mi² shares	Jun. 30, 2025 shares	Dec. 31, 2025 USD ($)
Organization
Coverage period				20 years
Estimated insurance recoveries and recoveries through electric rates		$ 1,523		$ 1,523		$ 1,266
Antidilutive awards excluded from earnings per share (in shares) \| shares		1,903,384	9,879,885	2,072,605	9,041,783
Revenue not yet approved	$ 1,500
Requested increase revenue requirement	$ 157
Requested increase revenue requirement (as a percent)	12.00%
Trio
Organization
Loss on disposition		$ 23
Long-term receivables from Wildfire Fund recoveries
Organization
Estimated insurance recoveries and recoveries through electric rates		645		$ 645		134
Eaton Fire
Organization
Estimated insurance recoveries and recoveries through electric rates		1,193		1,193		913
Eaton Fire \| Long-term receivables from Wildfire Fund recoveries
Organization
Estimated insurance recoveries and recoveries through electric rates		$ 645		$ 645		$ 134
SCE
Organization
Supply of electricity area covered (in square miles) \| mi²				50,000