v3.26.1
SCHEDULE H, LINE 4I-SCHEDULE OF ASSETS (HELD AT END OF YEAR) (Details) - EBP 003
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity tax identification number 93-0572810
Plan number 003
Participant loan, current value $ 44,156,323
Total current value $ 1,205,498,256
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan, interest rate (as a percent) 3.25%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan, interest rate (as a percent) 10.25%
Lithia Motors, Inc. Common Stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value $ 32,214,409
Investment, Identifier [Axis]: American Balanced Fund CL R6 | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 40,750,341
Investment, Identifier [Axis]: Columbia Small Cap Vl Fd Instl 3 | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 4,952,830
Investment, Identifier [Axis]: DFA US Vector Eqty Prtl Instl | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 18,046,471
Investment, Identifier [Axis]: Fidelity 500 Index Fund | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 123,269,066
Investment, Identifier [Axis]: Fidelity Government Cash Reserve | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 647
Investment, Identifier [Axis]: Fidelity Intrntnl Indx Instl | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 47,829,946
Investment, Identifier [Axis]: Fidelity Large Cap Grth Indx | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 72,825,566
Investment, Identifier [Axis]: Fidelity Mid CP Growth INDX | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 15,228,047
Investment, Identifier [Axis]: Fidelity Small Cap Index | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 9,848,103
Investment, Identifier [Axis]: Fidelity US Bond Index | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 11,608,783
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2025 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 42,952,704
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2030 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 73,207,882
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2035 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 79,567,997
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2040 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 84,012,454
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2045 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 92,513,910
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2050 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 94,839,492
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2055 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 86,881,185
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2060 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 94,877,181
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB 2065 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 14,119,277
Investment, Identifier [Axis]: JP Morgan Smart Retirement PB Income | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 32,023,697
Investment, Identifier [Axis]: Janus Henderson Flexible BD | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 20,383,725
Investment, Identifier [Axis]: John Hancock Disciplined | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 3,489,117
Investment, Identifier [Axis]: PIMCO Income Fund INSTL | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 9,914,973
Investment, Identifier [Axis]: Stable Value Fund Class R1 | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 26,921,356
Investment, Identifier [Axis]: State Street Russell Sml/Mid | Common/Collective Trusts  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value 18,802,812
Investment, Identifier [Axis]: Vanguard Emerging Mkts Instl | Mutual Funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
Investments, current value $ 10,259,962