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
Mar. 31, 2026
Mar. 31, 2025
Basic earnings per share:    
Net income available to Edison International common shareholders $ 531 $ 1,436
Earnings allocated to participating securities 0 (1)
Income available to common shareholders $ 531 $ 1,435
Weighted average common shares outstanding (in shares) 385 385
Basic earnings per share (in dollars per share) $ 1.38 $ 3.73
Diluted earnings per share:    
Income available to common shareholders $ 531 $ 1,435
Add back: Earnings allocated to participating securities 0 1
Net income available to Edison International common shareholders $ 531 $ 1,436
Weighted average common shares outstanding (in shares) 385 385
Effect of dilutive securities (in shares) 2 1
Adjusted weighted average shares - diluted (in shares) 387 386
Diluted earnings per share (in dollars per share) $ 1.37 $ 3.72