ACQUISITIONS - Schedule of Pro Forma Summary of All Acquisitions (Details) - USD ($) $ / shares in Units, $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | ||||
| Revenue | $ 9,847.7 | $ 9,745.3 | $ 19,250.2 | $ 19,079.0 |
| Net income attributable to Lithia Motors, Inc. | $ 261.6 | $ 259.7 | $ 364.3 | $ 472.1 |
| Basic EPS attributable to Lithia Motors, Inc. common stockholders (in dollars per share) | $ 11.63 | $ 10.02 | $ 15.88 | $ 18.08 |
| Diluted EPS attributable to Lithia Motors, Inc. common stockholders (in dollars per share) | $ 11.61 | $ 10.01 | $ 15.85 | $ 18.05 |
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- Definition Per basic share amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Per diluted share amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, after tax, of pro forma income (loss) of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of pro forma revenue of combined entity as if acquisition date of business combination occurred as of beginning of period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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