EQUITY - Dividends (Details) - USD ($) $ / shares in Units, shares in Millions							3 Months Ended				6 Months Ended
	Dec. 27, 2019	Nov. 18, 2019	Nov. 06, 2019	Sep. 30, 2019	Sep. 09, 2019	Aug. 28, 2019	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2019
Class of Stock [Line Items]
Dividends (in dollars per share)			$ 0.125			$ 0.125	$ 0.125	$ 0.125	$ 0.125	$ 0.125	$ 0.250
Dividend Value		$ 0.125			$ 0.125						$ 0.250
Dividends Settled in Cash	$ 65,500,000			$ 63,300,000							128,800,000
Dividend Settled in Stock	29,300,000			30,900,000							60,200,000
Dividends Payable	1,300,000			1,100,000			$ 2,400,000	$ 1,100,000			$ 2,400,000
Common Class A
Class of Stock [Line Items]
Dividend Settled in Stock	$ 29,300,000			$ 30,900,000			$ 29,500,000	$ 30,900,000
Issuance of shares of Class A Common Stock (in shares)	2.4			3.2