LONG-TERM DEBT - Schedule of Long-Term Debt (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Debt Instrument [Line Items]
Total principal payments due	$ 4,227,500,000	$ 2,637,500,000
Premium on notes	4,756,000	5,405,000
Debt issuance costs	(37,945,000)	(28,027,000)
Total amount outstanding	4,194,311,000	2,614,878,000
Less:
Current portion of long-term debt (note 11)	610,000,000	10,000,000
Non-current portion of long-term debt	3,584,311,000	2,604,878,000
Term Loan B
Debt Instrument [Line Items]
Total principal payments due	977,500,000	987,500,000
Less:
Current portion of long-term debt (note 11)	10,000,000	10,000,000
Senior Notes \| Senior Notes 2030
Debt Instrument [Line Items]
Total principal payments due	900,000,000	0
Senior Notes \| Senior Notes 2028
Debt Instrument [Line Items]
Total principal payments due	900,000,000	0
Senior Notes \| Senior Notes 2026
Debt Instrument [Line Items]
Total principal payments due	850,000,000	850,000,000
Senior Notes \| Senior Notes 2023
Debt Instrument [Line Items]
Total principal payments due	0	800,000,000
Revolver \| Line of Credit
Debt Instrument [Line Items]
Total principal payments due	600,000,000	0
Less:
Current portion of long-term debt (note 11)	$ 600,000,000	$ 0

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.

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