v3.26.1
FAIR VALUE (Details) - EBP 006 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 2,053,982,162 $ 1,842,058,039
Zions Bancorporation, N.A. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 366,899,621 357,846,882
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,990,444,629 1,776,566,735
Total | Zions Bancorporation, N.A. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 366,899,621 357,846,882
Total | Registered investment companies    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 679,650,082 602,630,940
Total | Common collective trusts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 943,894,926 816,088,913
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 1,990,444,629 1,776,566,735
Level 1 | Zions Bancorporation, N.A. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 366,899,621 357,846,882
Level 1 | Registered investment companies    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 679,650,082 602,630,940
Level 1 | Common collective trusts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 943,894,926 816,088,913
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Zions Bancorporation, N.A. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Registered investment companies    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Common collective trusts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 3 | Zions Bancorporation, N.A. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 3 | Registered investment companies    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 3 | Common collective trusts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Investments that use NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 63,537,533 65,491,304
Unfunded commitments $ 0 $ 0