v3.26.1
Summary of Significant Accounting Policies - Schedule of EPS Available to Edison International Common Shareholders (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Basic earnings per share:        
Net income available to Edison International common shareholders $ 534 $ 343 $ 1,065 $ 1,779
Earnings allocated to participating securities 0 0 0 (1)
Income available to common shareholders $ 534 $ 343 $ 1,065 $ 1,778
Weighted average common shares outstanding (in shares) 385 385 385 385
Basic earnings per share (in dollars per share) $ 1.39 $ 0.89 $ 2.77 $ 4.62
Diluted earnings per share:        
Income available to common shareholders $ 534 $ 343 $ 1,065 $ 1,778
Add back: Earnings allocated to participating securities 0 0 0 1
Net income available to Edison International common shareholders $ 534 $ 343 $ 1,065 $ 1,779
Weighted average common shares outstanding (in shares) 385 385 385 385
Effect of dilutive securities (in shares) 2 1 2 1
Adjusted weighted average shares - diluted (in shares) 387 386 387 386
Diluted earnings per share (in dollars per share) $ 1.38 $ 0.89 $ 2.75 $ 4.61