v3.26.1
FAIR VALUE MEASUREMENTS - Investments Measured at Fair Value (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 29,797,017 $ 25,236,978
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 25,406,404 21,671,373
Total | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 21,349,186 17,915,213
Total | Marriott Company Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 4,057,218 3,756,160
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 25,406,404 21,671,373
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 21,349,186 17,915,213
Level 1 | Marriott Company Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 4,057,218 3,756,160
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 2 | Marriott Company Stock Fund    
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 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Level 3 | Marriott Company Stock Fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 0 0
Fair Value Measured at Net Asset Value Per Share    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 4,390,613 $ 3,565,605