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STOCKHOLDER’S EQUITY AND EQUITY-BASED COMPENSATION - Narrative (Details) |  |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 20, 2024 USD ($) | Jul. 13, 2021 $ / shares shares | Jul. 12, 2021 plan | Jun. 30, 2024 USD ($) vote shares | Jun. 30, 2023 USD ($) | Jun. 30, 2024 USD ($) tradingDay vote shares | Jun. 30, 2023 USD ($) | Dec. 31, 2023 shares | Nov. 15, 2023 USD ($) | Sep. 20, 2023 USD ($) | Jun. 07, 2023 shares | Jun. 30, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Stock, shares authorized (in shares) |  |  |  | 1,525,000,000 |  | 1,525,000,000 |  |  |  |  |  |
Common stock authorized (in shares) |  |  |  | 1,500,000,000 |  | 1,500,000,000 |  | 1,500,000,000 |  |  |  |
Preferred stock authorized (in shares) |  |  |  | 25,000,000 |  | 25,000,000 |  |  |  |  |  |
Voting rights, non-citizen investors |  |  |  |  |  | 1.00% |  |  |  |  |  |
Number of equity-based compensation plans | plan |  |  | 9 |  |  |  |  |  |  |  |  |
Warrant right to purchase shares (in shares) |  |  |  | 0.1 |  | 0.1 |  |  |  |  | 0.1 |
Compensation expense | $ |  |  |  | $ 14,268,000 | $ 6,604,000 | $ 25,479,000 | $ 18,142,000 |  |  |  |  |
Shares withheld for employee taxes on vested equity (in shares) |  |  |  |  |  | 393,218 |  |  |  |  |  |
Term Loan | Credit Agreement | Term Loan and Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Face amount | $ |  |  |  |  |  |  |  |  | $ 390,000,000 | $ 350,000,000 |  |
2021 LTIP |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  | 30,100,000 |  | 30,100,000 |  |  |  |  |  |
Common Stock available for awards (in shares) |  |  |  |  |  | 25,000,000 |  | 2,415,000 |  |  |  |
2022 Inducement Grant Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Inducement grant plan (up to) (in shares) |  |  |  |  |  |  |  |  |  |  |  | 205,128
WUP Profits Interests |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average remaining contractual term (in years) |  |  |  |  |  | 7 years |  |  |  |  |  |
Compensation expense | $ |  |  |  |  |  | $ 0 | 100,000 |  |  |  |  |
WUP Profits Interests | MIP Plan VII |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  | 3,100,000 |  | 3,100,000 |  |  |  |  |  |
Stock options |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  | $ 0 | 400,000 | $ 0 | 900,000 |  |  |  |  |
Stock options | WUP Stock Option Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Shares authorized (in shares) |  |  |  | 1,800,000 |  | 1,800,000 |  |  |  |  |  |
Service period (in years) |  |  |  |  |  | 4 years |  |  |  |  |  |
Vesting period (in years) |  |  |  |  |  | 4 years |  |  |  |  |  |
Aggregate intrinsic value | $ |  |  |  | $ 0 |  | $ 0 |  |  |  |  |  |
Weighted average remaining contractual term, exercisable (in years) |  |  |  |  |  | 5 years |  |  |  |  |  |
Weighted average remaining contractual term, outstanding (in years) |  |  |  |  |  | 5 years |  |  |  |  |  |
Stock options | 2021 LTIP |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Service period (in years) |  |  |  |  |  | 3 years |  |  |  |  |  |
Vesting period (in years) |  |  |  |  |  | 3 years |  |  |  |  |  |
Aggregate intrinsic value | $ |  |  |  | 0 |  | $ 0 |  |  |  |  |  |
Weighted average remaining contractual term, exercisable (in years) |  |  |  |  |  | 3 years 4 months 24 days |  |  |  |  |  |
Weighted average remaining contractual term, outstanding (in years) |  |  |  |  |  | 3 years 4 months 24 days |  |  |  |  |  |
RSUs | 2021 LTIP |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation | $ |  |  |  | $ 16,500,000 |  | $ 16,500,000 |  |  |  |  |  |
Unrecognized compensation cost recognition period (in years) |  |  |  |  |  | 2 years 7 months 6 days |  |  |  |  |  |
Vested or will vest (in shares) |  |  |  |  |  | 893,000 |  |  |  |  |  |
Nonvested awards (in shares) |  |  |  | 4,908,000 |  | 4,908,000 |  | 1,848,000 |  |  |  |
RSUs | 2021 LTIP | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Service period (in years) |  |  |  |  |  | 4 years |  |  |  |  |  |
Vesting period (in years) |  |  |  |  |  | 4 years |  |  |  |  |  |
PSUs |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation | $ |  |  |  | $ 1,300,000 |  | $ 1,300,000 |  |  |  |  |  |
Unrecognized compensation cost recognition period (in years) |  |  |  |  |  | 2 years 3 months 18 days |  |  |  |  |  |
PSUs | 2021 LTIP |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vested or will vest (in shares) |  |  |  |  |  | 0 |  |  |  |  |  |
Nonvested awards (in shares) |  |  |  | 466,000 |  | 466,000 |  | 18,000 |  |  |  |
CEO Performance Award |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Inducement grant plan (up to) (in shares) |  |  |  | 73,000,000 |  | 73,000,000 |  |  |  |  |  |
CFO Performance Award |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Inducement grant plan (up to) (in shares) |  |  |  | 20,000,000 |  | 20,000,000 |  |  |  |  |  |
Executive Performance Award | 2022 CEO Awards |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation | $ |  |  |  | $ 221,600,000 |  | $ 221,600,000 |  |  |  |  |  |
Unrecognized compensation cost recognition period (in years) |  |  |  |  |  | 4 years 6 months |  |  |  |  |  |
Number of trading day period prior to the applicable determination date | tradingDay |  |  |  |  |  | 60 |  |  |  |  |  |
Vested or will vest (in shares) |  |  |  |  |  | 0 |  |  |  |  |  |
Grant-date fair value | $ | $ 43,900,000 |  |  |  |  |  |  |  |  |  |  |
Expected term (in years) | 5 years 2 months 12 days |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  | 11,100,000 | 0 | $ 19,100,000 | 0 |  |  |  |  |
Executive Performance Award | 2022 CEO Awards | Third share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Award vesting rights percentage |  |  |  |  |  | 25.00% |  |  |  |  |  |
Executive Performance Award | 2022 CEO Awards | Second share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Award vesting rights percentage |  |  |  |  |  | 25.00% |  |  |  |  |  |
Executive Performance Award | 2022 CEO Awards | First share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Award vesting rights percentage |  |  |  |  |  | 25.00% |  |  |  |  |  |
Executive Performance Award | 2022 CEO Awards | Share-Based Payment Arrangement, Tranche Four |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Award vesting rights percentage |  |  |  |  |  | 25.00% |  |  |  |  |  |
Executive Performance Award | CFO Performance Award |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Expected term (in years) | 4 years 10 months 24 days |  |  |  |  |  |  |  |  |  |  |
Executive Performance Award | CCO Performance Award |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Expected term (in years) | 4 years 8 months 12 days |  |  |  |  |  |  |  |  |  |  |
RSUs, PSUs, and Market-Based RSUs |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  | 3,100,000 | 6,200,000 | $ 6,300,000 | 11,900,000 |  |  |  |  |
Earnout Share |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Compensation expense | $ |  |  |  | $ 0 | $ 0 | $ 0 | $ 1,400,000 |  |  |  |  |
Nonvested awards (in shares) |  | 900,000 |  |  |  |  |  |  |  |  |  |
Earnout Share | Third share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Nonvested awards (in shares) |  |  |  | 3,000,000 |  | 3,000,000 |  |  |  |  |  |
Earnout Share | Second share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Nonvested awards (in shares) |  |  |  | 3,000,000 |  | 3,000,000 |  |  |  |  |  |
Earnout Share | First share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Nonvested awards (in shares) |  |  |  | 3,000,000 |  | 3,000,000 |  |  |  |  |  |
Profit Interest Based Award and Restricted Stock |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Weighted average remaining contractual term (in years) |  |  |  |  |  | 1 year 8 months 12 days |  |  |  |  |  |
Compensation expense | $ |  |  |  |  |  | $ 57,900,000 |  |  |  |  |  |
CK Wheels |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Voting restrictions |  |  |  | 23.90% |  | 23.90% |  |  |  |  |  |
Delta |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Voting restrictions |  |  |  | 29.90% |  | 29.90% |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Common stock authorized (in shares) |  |  |  | 1,500,000,000 |  | 1,500,000,000 |  |  |  |  |  |
Voting rights per share | vote |  |  |  | 1 |  | 1 |  |  |  |  |  |
Common Class A | Stock options | WUP Stock Option Plan |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock exercisable for each outstanding stock option |  |  |  | 1 |  | 1 |  |  |  |  |  |
Common Class A | Earnout Share | Third share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting milestone (in dollars per share) | $ / shares |  | $ 175.00 |  |  |  |  |  |  |  |  |  |
Common Class A | Earnout Share | Second share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting milestone (in dollars per share) | $ / shares |  | 150.00 |  |  |  |  |  |  |  |  |  |
Common Class A | Earnout Share | First share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Vesting milestone (in dollars per share) | $ / shares |  | $ 125.00 |  |  |  |  |  |  |  |  |  |
Common Class B | First share price vesting threshold |  |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Minimum threshold days (in days) |  | 20 days |  |  |  |  |  |  |  |  |  |
Number of consecutive trading days (in days) |  | 30 days |  |  |  |  |  |  |  |  |  |

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