SENIOR NOTES PAYABLE AND OTHER DEBT - Senior Notes (Details) - Subsequent Event $ in Millions	Apr. 30, 2023 CAD ($)
Debt instruments
Interest rate	3.17%
Senior Notes
Debt instruments
Debt Instrument, Repurchased Face Amount	$ 613.7
Repurchased amount	600.0
Senior Notes | 4.375% Senior Notes due 2045
Debt instruments
Debt Instrument, Face Amount	$ 600.0
Interest rate	5.398%
Senior Notes | 2.80% Senior Notes, Series E due 2024
Debt instruments
Interest rate	2.80%
Debt Instrument, Repurchased Face Amount	$ 527.0
Percentage of par value	0.976
Senior Notes | 4.125% Senior Notes, Series B due 2024
Debt instruments
Interest rate	4.125%
Debt Instrument, Repurchased Face Amount	$ 86.7
Percentage of par value	0.985
Ventas Canada Finance Limited
Debt instruments
Ownership Interest, Percentage	100.00%