SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) $ in Millions, $ in Millions	1 Months Ended			9 Months Ended
	May 02, 2024 USD ($)	Apr. 30, 2024 USD ($)	Apr. 30, 2024 CAD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 CAD ($)	Sep. 27, 2024 USD ($)	Sep. 27, 2024 CAD ($)	Sep. 05, 2024 USD ($)	May 13, 2024 USD ($)	Feb. 29, 2024 USD ($)	Feb. 29, 2024 CAD ($)
Senior Notes
Debt instruments
Repayments of senior debt	$ 800.0
Senior Notes | 5.100% Senior Notes, Series J due 2029
Debt instruments
Debt instrument, face amount										$ 478.3	$ 650.0
Senior Notes | 5.63% Senior Notes due 2034
Debt instruments
Debt instrument, face amount									$ 500.0
Senior Notes | 5.00% Senior Notes due 2035
Debt instruments
Debt instrument, face amount								$ 550.0
Senior Notes | 4.125% Senior Notes due 2026
Debt instruments
Debt instrument, face amount						$ 120.8	$ 163.3
5.100% Senior Notes, Series J due 2029
Debt instruments
Interest rate										5.10%	5.10%
Unsecured Term Loan due 2025
Debt instruments
Repayment and extinguishment of unsecured term loan				$ 369.4	$ 500.0
3.50% Senior Notes due 2024
Debt instruments
Interest rate				3.50%	3.50%
Repayments of senior debt	400.0
3.75% Senior Notes due 2024
Debt instruments
Interest rate				3.75%	3.75%
Repayments of senior debt	$ 400.0
2.80% Senior Notes, Series E due 2024
Debt instruments
Interest rate				2.80%	2.80%
Repayments of senior debt		$ 53.4	$ 73.0
5.63% Senior Notes due 2034
Debt instruments
Interest rate				5.625%	5.625%				5.625%
5.00% Senior Notes due 2035
Debt instruments
Interest rate				5.00%	5.00%			5.00%
4.125% Senior Notes, Series B due 2024
Debt instruments
Interest rate				4.125%	4.125%
4.125% Senior Notes due 2026
Debt instruments
Interest rate				4.125%	4.125%	4.125%	4.125%