EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Dividends Per Share (Details)										1 Months Ended	3 Months Ended		4 Months Ended	9 Months Ended
	Dec. 01, 2022 $ / shares	Dec. 01, 2022 $ / shares	Nov. 02, 2022 $ / shares	Nov. 02, 2022 $ / shares	Sep. 01, 2022 $ / shares	Aug. 31, 2022 $ / shares	May 31, 2022 $ / shares	Mar. 01, 2022	Feb. 28, 2022 $ / shares	Jun. 30, 2022 $ / shares	Sep. 30, 2022 $ / shares	Sep. 30, 2021 $ / shares	Jun. 30, 2022 $ / shares	Sep. 30, 2022 $ / shares	Sep. 30, 2021 $ / shares
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in dollars per share)									$ 0.835				$ 0.86
Common stock, dividends per share, paid (in dollars per share)											$ 0.860	$ 0.835		$ 2.580	$ 2.505
Common Stock Dividends Per Share Increase Decrease								3.00%
Preference Shares, Series L
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)					$ 0.36612	$ 0.30993
Common shares | Forecast
Dividends Payable [Line Items]
Common stock, dividends per share, paid (in dollars per share)	$ 0.86000
Common shares | Subsequent event
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in dollars per share)			$ 0.86000
Preferred share investment | Preference Shares, Series A | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.34375
Preferred share investment | Preference Shares, Series A | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.34375
Preferred share investment | Preference Shares, Series B
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)							$ 0.21340			$ 0.32513
Preferred share investment | Preference Shares, Series B | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.32513
Preferred share investment | Preference Shares, Series B | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.32513
Preferred share investment | Preference Shares, Series D | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.27875
Preferred share investment | Preference Shares, Series D | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.27875
Preferred share investment | Preference Shares, Series F | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.29306
Preferred share investment | Preference Shares, Series F | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.29306
Preferred share investment | Preference Shares, Series H | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.27350
Preferred share investment | Preference Shares, Series H | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.27350
Preferred share investment | Preference Shares, Series L | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)		$ 0.36612
Preferred share investment | Preference Shares, Series L | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)				$ 0.36612
Preferred share investment | Preference Shares, Series N | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.31788
Preferred share investment | Preference Shares, Series N | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.31788
Preferred share investment | Preference Shares, Series P | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.27369
Preferred share investment | Preference Shares, Series P | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.27369
Preferred share investment | Preference Shares, Series R | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.25456
Preferred share investment | Preference Shares, Series R | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.25456
Preferred share investment | Preference Shares, Series 1 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)		0.37182
Preferred share investment | Preference Shares, Series 1 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)				0.37182
Preferred share investment | Preference Shares, Series 3 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.23356
Preferred share investment | Preference Shares, Series 3 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.23356
Preferred share investment | Preference Shares, Series 5 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)		$ 0.33596
Preferred share investment | Preference Shares, Series 5 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)				$ 0.33596
Preferred share investment | Preference Shares, Series 7 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.27806
Preferred share investment | Preference Shares, Series 7 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.27806
Preferred share investment | Preference Shares, Series 9 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.25606
Preferred share investment | Preference Shares, Series 9 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.25606
Preferred share investment | Preference Shares, Series 11 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.24613
Preferred share investment | Preference Shares, Series 11 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.24613
Preferred share investment | Preference Shares, Series 13 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.19019
Preferred share investment | Preference Shares, Series 13 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.19019
Preferred share investment | Preference Shares, Series 15 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	0.18644
Preferred share investment | Preference Shares, Series 15 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			0.18644
Preferred share investment | Preference Shares, Series 19 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (dollars per share)	$ 0.30625
Preferred share investment | Preference Shares, Series 19 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (dollars per share)			$ 0.30625