EQUITY AND EARNINGS PER SHARE - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended				3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 18, 2024	Aug. 05, 2022	Sep. 30, 2021	Feb. 29, 2020	Aug. 31, 2019	Jul. 31, 2019	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Feb. 05, 2024
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Common stock, shares authorized (in shares)							2,000,000,000		2,000,000,000		2,000,000,000
Common stock, par value (in dollars per share)		$ 0.01					$ 0.01		$ 0.01		$ 0.01
Preferred stock, shares authorized (in shares)							100,000,000		100,000,000		100,000,000
Preferred stock, par value (in dollars per share)							$ 0.01		$ 0.01		$ 0.01
Number of shares issued (in shares)									51,964,000		51,964,000
Shares repurchased (in shares)									0
Dividends declared on preferred stock (in dollars per share)							$ 1.76	$ 1.76	$ 3.51	$ 3.51
Number of options (in shares)							21,473,990		21,473,990		21,473,990
Director
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options (in shares)							1,000		1,000
7.50% Series A Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of shares issued (in shares)									6,200,000		6,200,000
Dividends declared on preferred stock (in dollars per share)	$ 0.47						$ 0.47	0.47	$ 0.94	0.94
Interest rate						7.50%
Preferred dividends	$ 2.9
7.125% Series B Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of shares issued (in shares)									11,261,000		11,261,000
Dividends declared on preferred stock (in dollars per share)	$ 0.45						0.45	0.45	$ 0.89	0.89
Interest rate					7.125%
Preferred dividends	$ 5.0
6.375% Series C Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of shares issued (in shares)									15,903,000		15,903,000
Dividends declared on preferred stock (in dollars per share)	$ 0.40						0.40	0.40	$ 0.80	0.80
Interest rate				6.375%
Preferred dividends	$ 6.3
7.00% Fixed-Rate Reset Series D Cumulative Redeemable Preferred Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of shares issued (in shares)									18,600,000		18,600,000
Dividends declared on preferred stock (in dollars per share)	$ 0.44						$ 0.44	$ 0.44	$ 0.88	$ 0.88
Interest rate			7.00%
Preferred dividends	$ 8.1
Common Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Authorized repurchase amount												$ 200.0
Common Stock | Distribution Agreement
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Net proceeds from liquidation		$ 500.0
Number of shares issued (in shares)									6,100,000
Preferred Stock
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Authorized repurchase amount												$ 100.0