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Pay vs Performance Disclosure number in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Pay vs Performance Disclosure |  |  |  |  |
Pay vs Performance Disclosure, Table |
|  |  |  |  |  |  |  |  |  |  |  |  | Value of Initial Fixed $100 Investment Based On: |  |  |
Year | Summary Compensation Table Total for Kenningham(1) | Compensation Actually Paid to Kenningham(1) (2) (3) (4) | Summary Compensation Table Total for Hesterberg(1) | Compensation Actually Paid to Hesterberg(1) (2) (3) (4) | Average Summary Compensation Table Total for Non-CEO NEOs(5) | Average Compensation Actually Paid to Non-CEO NEOs(2) (3) (4) (5) | Total Shareholder Return | Peer Group Total Shareholder Return(6) | Net Income (in millions) | Adjusted Net Income from Continuing Operations (in millions)(7)
2024 |  | $ | 8,670,563 |  |  | $ | 16,559,548 |  |  | N/A |  | N/A |  | $ | 2,178,127 |  |  | $ | 3,602,728 |  |  | $ | 436.47 |  |  | $ | 285.86 |  |  | $ | 498.1 |  |  | $ | 530.6 |
2023 |  | $ | 7,274,300 |  |  | $ | 13,994,596 |  |  | N/A |  | N/A |  | $ | 2,053,869 |  |  | $ | 3,550,760 |  |  | $ | 313.79 |  |  | $ | 268.90 |  |  | $ | 601.6 |  |  | $ | 623.3 |
2022 |  | N/A |  | N/A |  | $ | 8,774,685 |  |  | $ | 8,501,251 |  |  | $ | 2,881,512 |  |  | $ | 2,877,697 |  |  | $ | 184.39 |  |  | $ | 189.75 |  |  | $ | 751.5 |  |  | $ | 728.7 |
2021 |  | N/A |  | N/A |  | $ | 8,577,257 |  |  | $ | 19,080,981 |  |  | $ | 2,684,236 |  |  | $ | 4,992,687 |  |  | $ | 197.96 |  |  | $ | 205.74 |  |  | $ | 552.1 |  |  | $ | 633.7 |
2020 |  | N/A |  | N/A |  | $ | 7,298,579 |  |  | $ | 12,911,445 |  |  | $ | 2,657,309 |  |  | $ | 3,543,096 |  |  | $ | 131.93 |  |  | $ | 146.68 |  |  | $ | 286.5 |  |  | $ | 333.0 |
Named Executive Officers, Footnote | Earl Hesterberg served as CEO until 12/31/2022. Effective 1/1/2023, Daryl Kenningham was named CEO.These numbers differ from those reported in 2023 as subsequent to that filing, an administrative error in interpretation and calculation with respect to 2021, 2022, and 2023 equity awards was discovered. The numbers in this filing represent a more accurate calculation of CAP for these individuals. (5)Non-CEO NEOs reflect the average Summary Compensation Table total compensation and average Compensation Actually Paid for the following executives by year: 2024: Daniel J. McHenry, Peter C. DeLongchamps, Gillian A. Hobson, Michael D. Jones 2023: Daniel J. McHenry, Peter C. DeLongchamps, Gillian A. Hobson, Michael D. Jones 2022: Daryl A. Kenningham, Daniel J. McHenry, Peter C. DeLongchamps, Darryl Burman 2021: Daryl A. Kenningham, Daniel J. McHenry, Frank Grese Jr., Peter C. DeLongchamps 2020: Daryl A. Kenningham, Daniel J. McHenry, John Rickel, Frank Grese Jr., Peter C. DeLongchamps |  |  |  |
Peer Group Issuers, Footnote | The peer group is comprised of Lithia Motors, AutoNation, Sonic Automotive, Penske Automotive Group and Asbury Automotive Group |  |  |  |
Adjustment To PEO Compensation, Footnote | Deductions from, and additions to, total compensation in the 2024 Summary Compensation Table to calculate Compensation Actually Paid consist of:
| 2024
| Daryl A. Kenningham |  | Average Non-CEO NEOs
Total Compensation from Summary Compensation | $ | 8,670,563 |  |  |  | $ | 2,178,127 |
Adjustments for Equity Awards |  |  |  |
Adjustment for grant date values in the Summary Compensation Table | $ | (4,999,757) |  |  |  | $ | (887,443) |
Year-end fair value of unvested awards granted in the current year | 8,453,376 |  |  |  | 1,469,797 |
Year-over-year difference of year-end fair values for unvested awards granted in prior years | 3,298,296 |  |  |  | 724,212 |
Fair values at vest date for awards granted and vested in current year | — |  |  |  | — |
Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years | 1,070,701 |  |  |  | 108,413 |
Forfeitures during current year equal to prior year-end fair value | — |  |  |  | — |
Dividends or dividend equivalents not otherwise included in the total compensation | 66,369 |  |  |  | 9,622 |
Total Adjustments for Equity Awards | $ | 7,888,985 |  |  |  | $ | 1,424,601 |
Compensation Actually Paid (as calculated) | $ | 16,559,548 |  |  |  | $ | 3,602,728 |
Non-PEO NEO Average Total Compensation Amount | $ 2,178,127 | $ 2,053,869 | $ 2,881,512 | $ 2,684,236 | $ 2,657,309
Non-PEO NEO Average Compensation Actually Paid Amount | $ 3,602,728 | 3,550,760 | 2,877,697 | 4,992,687 | 3,543,096
Adjustment to Non-PEO NEO Compensation Footnote | Deductions from, and additions to, total compensation in the 2024 Summary Compensation Table to calculate Compensation Actually Paid consist of:
| 2024
| Daryl A. Kenningham |  | Average Non-CEO NEOs
Total Compensation from Summary Compensation | $ | 8,670,563 |  |  |  | $ | 2,178,127 |
Adjustments for Equity Awards |  |  |  |
Adjustment for grant date values in the Summary Compensation Table | $ | (4,999,757) |  |  |  | $ | (887,443) |
Year-end fair value of unvested awards granted in the current year | 8,453,376 |  |  |  | 1,469,797 |
Year-over-year difference of year-end fair values for unvested awards granted in prior years | 3,298,296 |  |  |  | 724,212 |
Fair values at vest date for awards granted and vested in current year | — |  |  |  | — |
Difference in fair values between prior year-end fair values and vest date fair values for awards granted in prior years | 1,070,701 |  |  |  | 108,413 |
Forfeitures during current year equal to prior year-end fair value | — |  |  |  | — |
Dividends or dividend equivalents not otherwise included in the total compensation | 66,369 |  |  |  | 9,622 |
Total Adjustments for Equity Awards | $ | 7,888,985 |  |  |  | $ | 1,424,601 |
Compensation Actually Paid (as calculated) | $ | 16,559,548 |  |  |  | $ | 3,602,728 |
Compensation Actually Paid vs. Total Shareholder Return | CAP and Cumulative TSR / Cumulative TSR of the Peer Group CEO AND AVG. NON-CEO CAP VS GPI AND PEER TSR
|  | CEO CAP |  | Average Non-CEO NEO CAP
|  | Group 1 Automotive TSR |  | Peer Group TSR
Compensation Actually Paid vs. Net Income | CAP and Company Net Income CEO AND AVG. NON-CEO CAP VS NET INCOME
|  | CEO CAP |  | Average Non-CEO NEO CAP |  | GPI Net Income
Compensation Actually Paid vs. Company Selected Measure | CAP and Adjusted Net Income from Continuing Operations CEO AND AVG. NON-CEO CAP VS ADJUSTED NET INCOME FROM CONTINUING OPERATIONS
|  | CEO CAP |  | Average Non-CEO NEO CAP |  | GPI Adj. Net Income from Continuing Operations |
Total Shareholder Return Vs Peer Group | CAP and Cumulative TSR / Cumulative TSR of the Peer Group CEO AND AVG. NON-CEO CAP VS GPI AND PEER TSR
|  | CEO CAP |  | Average Non-CEO NEO CAP
|  | Group 1 Automotive TSR |  | Peer Group TSR
Tabular List, Table | TABULAR LIST OF FINANCIAL PERFORMANCE MEASURES In our assessment, the most important financial performance measures used to link CAP (as calculated in accordance with the SEC rules), to our NEOs in 2024 to our performance were: •Adjusted Net Income from Continuing Operations; •Relative Total Shareholder Return; and •Return on Invested Capital. |  |  |  |
Total Shareholder Return Amount | $ 436.47 | 313.79 | 184.39 | 197.96 | 131.93
Peer Group Total Shareholder Return Amount | 285.86 | 268.90 | 189.75 | 205.74 | 146.68
Net Income (Loss) | $ 498,100,000 | $ 601,600,000 | $ 751,500,000 | $ 552,100,000 | $ 286,500,000
Company Selected Measure Amount | 530.6 | 623.3 | 728.7 | 633.7 | 333.0
Adjustment to Compensation, Amount | $ 1,424,601 |  |  |  |
Additional 402(v) Disclosure | Equity valuation assumptions for calculating Compensation Actually Paid are not materially different from grant date valuation assumptions.Please see Appendix A on page 79 for the definition and reconciliation of |  |  |  |
Measure:: 1 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Adjusted Net Income from Continuing Operations |  |  |  |
Measure:: 2 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Relative Total Shareholder Return |  |  |  |
Measure:: 3 |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Name | Return on Invested Capital |  |  |  |
Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ (887,443) |  |  |  |
Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 1,469,797 |  |  |  |
Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 724,212 |  |  |  |
Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 108,413 |  |  |  |
Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 9,622 |  |  |  |
Daryl Kenningham [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount | 8,670,563 | $ 7,274,300 |  |  |
PEO Actually Paid Compensation Amount | 16,559,548 | $ 13,994,596 |  |  |
Adjustment to Compensation, Amount | $ 7,888,985 |  |  |  |
PEO Name | Daryl Kenningham | Daryl Kenningham |  |  |
Daryl Kenningham [Member] | Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ (4,999,757) |  |  |  |
Daryl Kenningham [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 8,453,376 |  |  |  |
Daryl Kenningham [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 3,298,296 |  |  |  |
Daryl Kenningham [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Daryl Kenningham [Member] | Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 1,070,701 |  |  |  |
Daryl Kenningham [Member] | Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | 0 |  |  |  |
Daryl Kenningham [Member] | Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
Adjustment to Compensation, Amount | $ 66,369 |  |  |  |
Earl Hesterberg [Member] |  |  |  |  |
Pay vs Performance Disclosure |  |  |  |  |
PEO Total Compensation Amount |  |  | $ 8,774,685 | $ 8,577,257 | $ 7,298,579
PEO Actually Paid Compensation Amount |  |  | $ 8,501,251 | $ 19,080,981 | $ 12,911,445
PEO Name |  |  | Earl Hesterberg | Earl Hesterberg | Earl Hesterberg

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