Subsequent Event (Details) - Ventas, Inc [Member] - Master Lease And Security Agreement [Member]		12 Months Ended
	Apr. 26, 2018 USD ($) community extension_option	Dec. 31, 2018 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Apr. 26, 2019 USD ($)
Subsequent Event [Member]
Subsequent Event [Line Items]
Number of communities leased | community	128
Prior number of communities | community	107
Additional number of communities | community	21
Number of extensions | extension_option	2
Extension term	10 years
Investment minimum, unit per lease	$ 2,000
Period of lease	24 months
Payment for change of control fees	$ 25,000,000
Forecast [Member]
Subsequent Event [Line Items]
Rent expense		$ 175,000,000
Rent credit		8,000,000	$ 5,000,000	$ 7,000,000	$ 8,000,000
Rent credit after change of control		$ 5,000,000
Base rent escalator, CPI increase					2.25%
Base rent escalator, CPI decrease					0.00%
Option to terminate, annual base rent						$ 30,000,000
Option to terminate, rent reduction percentage						6.25%