v3.26.1
Fair Value Measurements - Plan's Investments Measured at Fair Value on Recurring Basis (Details) - EBP 002 - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 6,943,726 $ 6,275,316
Edison International Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 200,614 305,123
Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 355,774 370,643
Self-directed brokerage accounts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,152,779 1,038,920
Mutual fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 294,131 242,629
Collective investment funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 3,906,267 3,320,649
Total separate managed funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,034,161 997,352
Cash and other short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 10,630 10,923
Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 9,864 3,869
Fixed income securities2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 299,502 283,217
Common and preferred stocks    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 686,392 680,899
Other    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 27,773 18,444
Separate managed funds, mortgage-backed securities    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 17,130 17,935
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 2,398,574 2,327,158
Level 1 | Edison International Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 200,359 304,477
Level 1 | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 1 | Self-directed brokerage accounts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,148,702 1,032,298
Level 1 | Mutual fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 294,131 242,629
Level 1 | Collective investment funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 1 | Total separate managed funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 755,382 747,754
Level 1 | Cash and other short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 383 1,116
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 1 | Fixed income securities2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 65,127 63,006
Level 1 | Common and preferred stocks    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 684,797 678,825
Level 1 | Other    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 5,075 4,807
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 263,386 243,692
Level 2 | Edison International Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Self-directed brokerage accounts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 4,077 6,622
Level 2 | Mutual fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Collective investment funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Total separate managed funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 259,309 237,070
Level 2 | Cash and other short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 641 1,148
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Fixed income securities2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 234,375 220,211
Level 2 | Common and preferred stocks    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,595 2,074
Level 2 | Other    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 22,698 13,637
NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 4,281,766 3,704,466
NAV | Edison International Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 255 646
NAV | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 355,774 370,643
NAV | Self-directed brokerage accounts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
NAV | Mutual fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
NAV | Collective investment funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 3,906,267 3,320,649
NAV | Total separate managed funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 19,470 12,528
NAV | Cash and other short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 9,606 8,659
NAV | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 9,864 3,869
NAV | Fixed income securities2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
NAV | Common and preferred stocks    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
NAV | Other    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 0 $ 0