XML 116 R116.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Deconsolidation of a Real Estate Development Company - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Sep. 30, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Real Estate Properties [Line Items]                        
Revenues $ 460.3 $ 768.6 $ 1,061.1 $ 1,087.0 $ 151.7 $ 679.1 $ 893.6 $ 702.8   $ 3,377.0 $ 2,427.2 $ 3,676.2
Interest and other expenses                   $ 0.0 $ 0.0 202.5
Urbplan                        
Real Estate Properties [Line Items]                        
Deconsolidation loss                 $ 65.0      
Revenues                       109.9
Interest and other expenses                       $ 138.0