Summary Of Significant Accounting Policies (Real Estate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Depreciation expense real estate	$ 282.0	$ 265.7	$ 245.1
Building and major improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	35 years
Building and major improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	50 years
Minor improvements, furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	2 years
Minor improvements, furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years