Annual report pursuant to Section 13 and 15(d)

Commitments And Contingencies (Other) (Narrative) (Details)

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Commitments And Contingencies (Other) (Narrative) (Details) - Property Lock-Ups Expired [Member]
$ in Billions
12 Months Ended
Dec. 31, 2019
USD ($)
property
Commitments And Contingencies [Line Items]  
Number of properties | property 27
Properties aggregate net book value | $ $ 1.9