v3.26.1
Fair Value Measurements (Details) - EBP Plans - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value $ 1,119,098,403 $ 994,409,198
Total investments at fair value    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 256,835,574 237,747,478
Total investments at fair value | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 208,809,414 190,799,741
Total investments at fair value | Adient Ordinary Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 18,307,947 16,442,846
Total investments at fair value | Other Common Stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 29,040,553 29,665,476
Total investments at fair value | Interest Bearing Cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 677,660 839,415
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 256,835,574 236,908,063
Level 1 | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 208,809,414 190,799,741
Level 1 | Adient Ordinary Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 18,307,947 16,442,846
Level 1 | Other Common Stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 29,040,553 29,665,476
Level 1 | Interest Bearing Cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 677,660 0
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value   839,415
Level 2 | Mutual Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value   0
Level 2 | Adient Ordinary Shares    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value   0
Level 2 | Other Common Stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value   0
Level 2 | Interest Bearing Cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value   839,415
Total Investments at NAV    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value 862,262,829 756,661,720
Total Investments at NAV | Common/Collective Trust Funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total Master Trust Investments at Fair Value $ 862,262,829 $ 756,661,720