Accounting Policies and Related Matters - Spot Occupancy (Details) - Seniors Housing Operating - COVID-19	Jul. 31, 2020	Jun. 30, 2020	May 31, 2020	Apr. 30, 2020	Mar. 31, 2020	Feb. 29, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Spot occupancy		80.10%	81.00%	82.80%	85.00%	85.80%
Sequential occupancy change		(0.90%)	(1.80%)	(2.20%)	(0.80%)
Subsequent event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Spot occupancy	79.40%
Sequential occupancy change	(0.70%)