XML 101 R82.htm IDEA: XBRL DOCUMENT v3.10.0.1
Real Estate - Depreciation and Impairment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Real Estate      
Real Estate [Line Items]      
Depreciation $ 471.6 $ 453.3 $ 108.3