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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) | 2 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022 | Oct. 31, 2024 | Mar. 31, 2024
Debt Instrument [Line Items] |  |  |  |  |  |
Total production content |  | $ 93,081,000 | $ 61,421,000 |  |  |
Advertising costs |  | 25,295,000 | 16,977,000 | $ 22,880,000 |  |
Accounts receivable, allowance for credit loss |  | $ 10,000 | 171,000 |  |  |
Equity method investments, recognition of proportionate share of income, lag period |  | 3 months |  |  |  |
Customer advances, ticket sales |  | $ 72,619,000 |  |  |  |
Capital expenditures reflected in payables |  | 417,087,000 | 515,731,000 |  |  |
Capital expenditure accruals |  | 156,234,000 | 236,593,000 |  |  |
Long-term debt |  | 1,383,500,000 |  |  |  |
Net |  | 849,437,000 | 82,500,000 |  |  |
Continuing Operations |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  | 559,757,000 | 131,965,000 |  |  | $ 680,575,000
Secured Debt | Forecast | MSG Networks |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Repayments of secured debt | $ 20,625,000 |  |  |  |  |
Secured Debt | Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  | 522,735,000 | 1,118,387,000 |  |  |
MSG Networks |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  | 117,807,000 |  |  |  |
MSG Networks Credit Facilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  | 849,750,000 |  |  |  |
MSG Networks Credit Facilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  | 849,750,000 |  |  |  |
MSG Networks Credit Facilities | Secured Debt | Line of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  | 0 | 848,267,000 |  |  |
Net |  | $ 849,437,000 | $ 82,500,000 |  |  |
Long-term debt, term |  | 1 year |  |  |  |
MSG Networks Credit Facilities | Secured Debt | Line of Credit | Forecast |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Net |  |  |  |  | $ 829,125,000 |

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