SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) $ in Millions, $ in Millions	1 Months Ended			3 Months Ended
	May 02, 2024 CAD ($)	May 02, 2024 USD ($)	Feb. 29, 2024 CAD ($)	Mar. 31, 2024 USD ($)
Senior Notes | Subsequent Event
Debt instruments
Repayments of senior debt		$ 854.0
Senior Notes | 5.100% Senior Notes, Series J due 2029
Debt instruments
Debt instrument, face amount			$ 650.0
5.100% Senior Notes, Series J due 2029
Debt instruments
Interest rate			5.10%
Unsecured Term Loan due 2025
Debt instruments
Repayment and extinguishment of unsecured term loan			$ 500.0	$ 369.4
3.50% Senior Notes due 2024
Debt instruments
Interest rate				3.50%
3.50% Senior Notes due 2024 | Subsequent Event
Debt instruments
Repayments of senior debt		400.0
3.75% Senior Notes due 2024
Debt instruments
Interest rate				3.75%
3.75% Senior Notes due 2024 | Subsequent Event
Debt instruments
Repayments of senior debt		400.0
2.80% Senior Notes, Series E due 2024
Debt instruments
Interest rate				2.80%
2.80% Senior Notes, Series E due 2024 | Subsequent Event
Debt instruments
Repayments of senior debt	$ 73.0	$ 54.0