EARNINGS PER COMMON SHARE AND DIVIDENDS PER SHARE - Schedule of Dividends Per Share (Details)	3 Months Ended	6 Months Ended
	Dec. 31, 2025 $ / shares	Jun. 30, 2026 $ / shares	Jun. 30, 2026 $ / shares
Dividends Payable [Line Items]
Common stock, dividends, per share, declared (in Canadian dollars per share)		$ 0.97
Preference Shares, Series A
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.34375
Preference Shares, Series B
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.32513
Preference Shares, Series D
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.33825
Preference Shares, Series F
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.34613
Preference Shares, Series G
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)	$ 0.29616	0.30247
Preference Shares, Series H
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.382
Preference Shares, Series I
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)	0.27159	0.27789
Preference Shares, Series L
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)			$ 0.36612
Preference Shares, Series N
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.4185
Preference Shares, Series P
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.36988
Preference Shares, Series R
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.39463
Preference Shares, Series 1
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)			0.41898
Preference Shares, Series 3
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.3305
Preference Shares, Series 4
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)	$ 0.28797	0.29427
Preference Shares, Series 5
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)			$ 0.41769
Preference Shares, Series 7
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.37425
Preference Shares, Series 9
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.3545
Preference Shares, Series 11
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.34231
Preference Shares, Series 13
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.33719
Preference Shares, Series 15
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		0.35163
Preference Shares, Series 19
Dividends Payable [Line Items]
Preferred shares, dividend declared per share (in Canadian dollars per share)		$ 0.38825