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Debt (Additional Information) (Details) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 06, 2025 | Jan. 17, 2025 | Dec. 03, 2024 | Aug. 21, 2024 | Jan. 26, 2024 | Jan. 25, 2024 | Nov. 01, 2023 | Nov. 22, 2022 | Sep. 22, 2022 | Apr. 11, 2022 | Mar. 11, 2022 | Aug. 12, 2021 | Mar. 01, 2021 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023 | Feb. 28, 2025 | Jan. 31, 2025 | Dec. 13, 2024 | Dec. 06, 2024
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 109,873 | $ 51,896 | $ 150,861 |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 71 |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 558,283 | 658,283 |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,738 |  |  |  |  |  |
Title IV Letter Of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  | $ 157,900 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of funds received |  |  |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Walden Title IV Letter Of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit expired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 69,400
Surety Bond |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Guarantor Obligations, Current Carrying Value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 67,300 |  |  |  |  |  |
Letter of Credit [Member] | Title IV Letter Of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  | $ 179,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 179,000 |  |  |  |  |  |
Percentage of funds received |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |  |  |  |  |  |
Commitment fee percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.25% |  |  |  |  |  |
Undrawn amount on letters of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |  |  |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  |  |  |  | Aug. 12, 2026 |  |  |  |  |  |  |  |  |  |  |
Line of credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 | 0 |  |  |  |
Term |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |  |
Revolving Credit Facility | Title IV Letter Of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 99,000 | $ 99,000 |
Revolving Credit Facility | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional borrowing capacity | $ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, maturity date | Aug. 06, 2030 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Alternate Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2.75% |  |  |  |  |  |
Revolving Credit Facility | Alternate Base Rate | Minimum | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 1.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | Alternate Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.25% |  |  |  |  |  |
Revolving Credit Facility | Alternate Base Rate | Maximum | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floor rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.75% |  |  |  |  |  |
Revolving Credit Facility | SOFR | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.75% |  |  |  |  |  |
Revolving Credit Facility | SOFR | Minimum | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 2.25% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revolving Credit Facility | SOFR | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.25% |  |  |  |  |  |
Revolving Credit Facility | SOFR | Maximum | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Surety-Backed Letter of Credit [Member] | Title IV Letter Of Credit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 99,000 |  | $ 80,000 |
Senior Secured Notes Due 2028 And Term B Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7 years |  |  |  |  |  |
Senior Secured Notes Due 2028 And Term B Loan | Maximum | Scenario Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total net leverage ratio |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3.25 |  |  |  |  |  |
Senior Secured Notes Due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 800,000 |  |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 5.50% |  |  |  |  |  |  |  |  |  |
Repayment of long-term debt |  |  |  |  |  |  |  |  |  | $ 373,300 |  |  |  | $ 20,800 |  | $ 900 |  |  |  |  |  |  |
Gain on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 404,950 | 404,950 |  |  |  |  |
Percentage of notes issued on par value |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  | 90.00% |  | 92.00% |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15 |  |  |  |
Senior Secured Notes Due 2028 | Accrued Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument, Accrued Interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,400 | 7,400 |  |  |  |  |
Senior Secured Notes Due 2028 | 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  |  |  |  |  |  |  |  |  |  | 102.75% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 | 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  |  |  |  |  |  |  |  |  |  | 101.375% |  |  |  |  |  |  |  |  |  |
Senior Secured Notes Due 2028 | 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Redemption price, percentage of principal amount redeemed |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Term B Loan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  |  |  |  |  |  |  | $ 850,000 |  |  |  |  |  |  |  |  |  |  |
Fixed interest rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.08% |  |  |  |  |  |
Repayment of long-term debt |  | $ 100,000 |  |  | $ 50,000 |  |  | $ 50,000 | $ 100,000 |  | $ 396,700 |  |  |  |  |  | $ 100,000 | 50,000 | 150,000 |  |  |  |
Long-term debt, gross |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 153,333 | 253,333 |  |  |  |  |
Reduction in margin interest rate |  |  |  | (0.75%) | (0.50%) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,125 |  | 0 |  |  |  |  |  |
Debt instrument, maturity date |  |  |  |  |  |  |  |  |  |  |  | Aug. 12, 2028 |  |  |  |  |  |  |  |  |  |  |
Debt instrument, issuance price, percent of principal amount |  |  |  |  |  |  |  |  |  |  |  | 99.00% |  |  |  |  |  |  |  |  |  |  |
Debt instrument, issuance discount, percent |  |  |  |  |  |  |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,738 | 1,113 | 4,282 |  |  |  |
Term B Loan | Interest Expense. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Issuance Costs Write-off |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,700 | $ 1,100 | $ 4,300 |  |  |  |
Term B Loan | Alternate Base Rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  | 1.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Alternate Base Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 2.50% | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Alternate Base Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 3.00% | 3.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Eurocurrency Rate | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 3.50% | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan | Eurocurrency Rate | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  |  | 4.00% | 4.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term B Loan | SOFR |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic spread rate |  |  |  | 2.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Floor rate |  |  |  | 0.75% | 0.75% | 0.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

X
- Definition The amount of accrued interest on debt instrument for the period. + References No definition available. + Details
Name: | atge_DebtInstrumentAccruedInterest
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the ratio of consolidated total debt to consolidated adjusted earnings before, interest, taxes, depreciation and amortization allowed under the terms of the senior credit facilities' covenants. + References No definition available. + Details
Name: | atge_DebtInstrumentCovenantConsolidatedLeverageRatio
Namespace Prefix: | atge_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percent of debt discount. + References No definition available. + Details
Name: | atge_DebtInstrumentIssuanceDiscountPercent
Namespace Prefix: | atge_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Issuance price of debt instrument as a percent of principal amount. + References No definition available. + Details
Name: | atge_DebtInstrumentIssuancePricePercentOfPrincipalAmount
Namespace Prefix: | atge_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of floor on the variable rate. + References No definition available. + Details
Name: | atge_DebtInstrumentVariableRateFloorRate
Namespace Prefix: | atge_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amortization period of debt issuance costs. + References No definition available. + Details
Name: | atge_DebtIssuanceCostsAmortizationPeriod
Namespace Prefix: | atge_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit expired as of the reporting date. + References No definition available. + Details
Name: | atge_LettersOfCreditOutstandingExpiredAmount
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of additional borrowing capacity under the credit facility without consideration of any current restrictions. + References No definition available. + Details
Name: | atge_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix: | atge_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The percentage of consolidated funds received under Title IV programs. + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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