EQUITY AND CONVERTIBLE PREFERRED STOCK - Preferred Stock (Details)																		12 Months Ended
	Jun. 03, 2021 USD ($)	Jul. 31, 2020 USD ($) shares	May 26, 2020 USD ($) shares	May 11, 2020 USD ($) tranche individual $ / shares shares	Mar. 27, 2020 shares	Feb. 27, 2020 shares	Feb. 18, 2020 USD ($)	Nov. 18, 2019 USD ($)	Sep. 09, 2019 USD ($)	Jun. 18, 2019 shares	Jun. 14, 2019 shares	Jun. 06, 2019 USD ($)	Feb. 28, 2019 USD ($)	Feb. 04, 2019 shares	Jan. 15, 2019 shares	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	Jun. 30, 2021 USD ($) vote day $ / shares shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Apr. 29, 2020 shares	Mar. 26, 2020 shares	Jun. 17, 2019 shares	Jun. 13, 2019 shares	Jan. 14, 2019 shares	Nov. 16, 2017 shares	Mar. 27, 2017 shares	Feb. 16, 2017 shares
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares																		$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)																		20,000,000.0	20,000,000.0
Preferred stock, shares issued (shares)																		1,500,000	1,500,000
Preferred stock, shares outstanding (shares)																		1,500,000	1,500,000
Preferred stock classified as equity | $																		$ 0
Preferred stock classified as a liability | $																		900,000
Sale of stock, number of tranches | tranche				2
Dividends payable | $							$ 1,200,000	$ 1,300,000	$ 1,100,000			$ 1,100,000	$ 1,200,000			$ 1,200,000	$ 800,000		$ 3,600,000	$ 4,300,000
Number of individuals elected to the Board | individual				2
Dividends | $							$ 96,300,000	$ 96,100,000	$ 95,300,000			$ 95,100,000	$ 95,100,000			$ 95,100,000	$ 94,600,000	$ 0	287,700,000	$ 379,900,000
Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares																		$ 0.01
Number of votes entitled to holders | vote																		0
Preferred stock, shares authorized (shares)										2,900,000					3,300,000			20,000,000					3,300,000		6,300,000
Stock cancelled during period (in shares)										400,000					3,000,000.0
Preferred stock, shares issued (shares)																		1,500,000								1,000,000.0	1,000,000.0	500,000
Preferred stock, shares outstanding (shares)																		1,500,000								200,000	1,000,000.0	300,000
Series A-1 Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares authorized (shares)					0						7,900,000											7,900,000		6,900,000
Stock authorized, designated and issued during period (in shares)											1,000,000.0			6,900,000
Stock reacquired, retired and cancelled (in shares)					7,900,000	6,900,000
Exchange value pricing determination period																		10 days
Preferred stock, shares issued (shares)																		0
Preferred stock, shares outstanding (shares)																		0
Convertible Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share) | $ / shares				$ 0.01
Investment agreement, shares to be sold (in shares)				1,000,000
Investment agreement, maximum aggregate purchase price | $				$ 1,000,000,000
Investment agreement, sale of stock (in dollars per share) | $ / shares				$ 1,000
Issuance and sale of stock (in shares)		250,000	750,000
Issuance and sale of stock, aggregate purchase price | $		$ 250,000,000.0	$ 750,000,000.0
Direct and incremental issuance expense | $			$ 40,700,000
Preferred stock dividend rate			9.00%															9.00%
Dividends Paid- Convertible Series B Preferred Stock | $	$ 24,200,000
Dividends payable | $																		$ 74,100,000	$ 6,500,000
Liquidation preference (in dollars per share) | $ / shares																		$ 1,000
Liquidation preference | $																		$ 1,000,000,000
Preferred stock dividend rate, increase on seven-year anniversary of issuance																		1.00%
Preferred stock, period after which dividend rate will increase																		7 years
Preferred stock dividend rate, annual increase on each subsequent anniversary																		1.00%
Preferred stock dividend rate, maximum after increases																		12.00%
Preferred stock dividend rate, additional increase if dividends are not paid																		1.00%
Conversion price (in dollars per share) | $ / shares																		$ 6.24
Conversion ratio																		160.2564
Volume weighted average price for 20 trading days exceeds, Company may convert shares (in dollars per share) | $ / shares																		$ 12.48
Preferred stock, convertible, threshold trading days | day																		20
Preferred stock, convertible, threshold consecutive trading days | day																		30
Dividends payable as if converted (in shares)																		172,123,533
Shares converted (in shares)																		0
Redemption features, percentage of liquidation preference																		100.00%
Redemption features, multiplier of unpaid dividends after fifth anniversary and prior to sixth anniversary																		107.00%
Redemption features, multiplier of unpaid dividends after sixth anniversary and prior to seventh anniversary																		105.00%
Redemption features, multiplier of unpaid dividends after seventh anniversary																		100.00%
Change of control put, percentage of liquidation preference, on or before fifth anniversary																		110.00%
Change of control put, percentage of liquidation preference, on or after fifth anniversary																		100.00%
Convertible Series B Preferred Stock | Initial Issuance
Class of Stock [Line Items]
Investment agreement, shares to be sold (in shares)				750,000
Convertible Series B Preferred Stock | Second Issuance
Class of Stock [Line Items]
Investment agreement, shares to be sold (in shares)				250,000
Common Class A
Class of Stock [Line Items]
Dividend Reinvestment Program, shares registered for purchase (in shares)																					19,300,000
Dividend Reinvestment Program, percentage of cash dividends reinvested																					50.00%
Tranche One | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)																		1,000,000
Tranche One | Stock Compensation Plan | Series A-1 Preferred Stock
Class of Stock [Line Items]
Award vesting rights, percentage																		60.00%
Vesting period																		3 years
Tranche Two | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares outstanding (shares)																		500,000
Tranche Two | Stock Compensation Plan | Series A-1 Preferred Stock
Class of Stock [Line Items]
Award vesting rights, percentage																		20.00%
Vesting period																		4 years
Tranche Three | Stock Compensation Plan | Series A-1 Preferred Stock
Class of Stock [Line Items]
Award vesting rights, percentage																		20.00%
Vesting period																		5 years