v3.26.1
FAIR VALUE MEASUREMENTS - Plan's Investments (Details) - EBP 002 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 326,798,278 $ 312,935,520
Valvoline Inc. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 41,207,836 58,417,747
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 58,507,998 75,682,370
Total | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 379,222 503,108
Total | Valvoline Inc. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 41,207,836 58,417,747
Total | Self-directed brokerage accounts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 16,920,940 16,761,515
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 58,507,998 75,682,370
Level 1 | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 379,222 503,108
Level 1 | Valvoline Inc. common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 41,207,836 58,417,747
Level 1 | Self-directed brokerage accounts    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value 16,920,940 16,761,515
NAV | Collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Investments, at fair value $ 268,290,280 $ 237,253,150