Real Estate and Other Activities - Summary of Operating Results from Properties Sold (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022
Straight-line rent write-offs		$ 42.0
Disposal Group, Not Discontinued Operations [Member]
Straight line rent and other write offs	$ 35.0	42.0
Massachusetts-based General Acute Care Hospitals [Member]
Straight-line rent write-offs	125.0	125.0
Massachusetts-based General Acute Care Hospitals [Member] | Disposal Group, Not Discontinued Operations [Member]
Gains	$ 68.8	$ 536.8