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COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Jun. 24, 2018 | [1]
Loss Contingencies [Line Items] |  |
Restricted cash and investments | $ 255,774,000 | $ 256,301,000
Letters of Credit |  |
Loss Contingencies [Line Items] |  |
Guarantee obligation maximum exposure | 27,200,000 |
Operating Leases |  |
Loss Contingencies [Line Items] |  |
Operating lease residual value of guarantee, maximum | $ 220,400,000 |
Maximum percentage of aggregate investment value guaranteed | 100.00% |
Guarantee obligation maximum exposure | $ 250,000,000.0 |
Operating Lease Cash Collateral |  |
Loss Contingencies [Line Items] |  |
Restricted cash and investments | $ 250,000,000.0 |
[1] | Derived from audited financial statements

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