EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Dividends Per Share (Details)									3 Months Ended
	Jun. 01, 2024 $ / shares	Jun. 01, 2024 $ / shares	Apr. 23, 2024 $ / shares	Apr. 23, 2024 $ / shares	Mar. 01, 2024 $ / shares	Mar. 01, 2024 $ / shares	Feb. 29, 2024 $ / shares	Feb. 29, 2024 $ / shares	Mar. 31, 2024 $ / shares	Mar. 31, 2023 $ / shares
Dividends Payable [Line Items]
Common stock, dividends per share, paid (in canadian dollars per share)									$ 0.92	$ 0.89
Common shares | Forecast
Dividends Payable [Line Items]
Common stock, dividends per share, paid (in canadian dollars per share)	$ 0.91500
Common shares | Subsequent event
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in Canadian dollars per share)			$ 0.91500
Preferred share investment | Preference Shares, Series A | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.34375
Preferred share investment | Preference Shares, Series A | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.34375
Preferred share investment | Preference Shares, Series B | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.32513
Preferred share investment | Preference Shares, Series B | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.32513
Preferred share investment | Preference Shares, Series D | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.33825
Preferred share investment | Preference Shares, Series D | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.33825
Preferred share investment | Preference Shares, Series F | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.34613
Preferred share investment | Preference Shares, Series F | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.34613
Preferred share investment | Preference Shares, Series G
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)					$ 0.47383		$ 0.47676
Preferred share investment | Preference Shares, Series G | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.47383
Preferred share investment | Preference Shares, Series G | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.47383
Preferred share investment | Preference Shares, Series H | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.38200
Preferred share investment | Preference Shares, Series H | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.38200
Preferred share investment | Preference Shares, Series I
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)					0.44932		0.45251
Preferred share investment | Preference Shares, Series I | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)	0.44932
Preferred share investment | Preference Shares, Series I | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)			0.44932
Preferred share investment | Preference Shares, Series L | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)		$ 0.36612
Preferred share investment | Preference Shares, Series L | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)				$ 0.36612
Preferred share investment | Preference Shares, Series N | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.41850
Preferred share investment | Preference Shares, Series N | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.41850
Preferred share investment | Preference Shares, Series P
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)					$ 0.36988		$ 0.27369
Preferred share investment | Preference Shares, Series P | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.36988
Preferred share investment | Preference Shares, Series P | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.36988
Preferred share investment | Preference Shares, Series R | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.25456
Preferred share investment | Preference Shares, Series R | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.25456
Preferred share investment | Preference Shares, Series 1 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)		0.41898
Preferred share investment | Preference Shares, Series 1 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)				0.41898
Preferred share investment | Preference Shares, Series 3 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.23356
Preferred share investment | Preference Shares, Series 3 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.23356
Preferred share investment | Preference Shares, Series 5
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)						$ 0.41769		$ 0.33596
Preferred share investment | Preference Shares, Series 5 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)		$ 0.41769
Preferred share investment | Preference Shares, Series 5 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)				$ 0.41769
Preferred share investment | Preference Shares, Series 7
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)						$ 0.37425		$ 0.27806
Preferred share investment | Preference Shares, Series 7 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.37425
Preferred share investment | Preference Shares, Series 7 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.37425
Preferred share investment | Preference Shares, Series 9 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.25606
Preferred share investment | Preference Shares, Series 9 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.25606
Preferred share investment | Preference Shares, Series 11 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.24613
Preferred share investment | Preference Shares, Series 11 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.24613
Preferred share investment | Preference Shares, Series 13 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.19019
Preferred share investment | Preference Shares, Series 13 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.19019
Preferred share investment | Preference Shares, Series 15 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	0.18644
Preferred share investment | Preference Shares, Series 15 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			0.18644
Preferred share investment | Preference Shares, Series 19 | Forecast
Dividends Payable [Line Items]
Preferred stock, dividend paid per share (in Canadian dollars per share)	$ 0.38825
Preferred share investment | Preference Shares, Series 19 | Subsequent event
Dividends Payable [Line Items]
Preferred stock, dividend declared per share (in Canadian dollars per share)			$ 0.38825