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Consolidated Variable Interest Entities ("VIEs") and Investments in Affiliates - Additional Information (Detail)
$ in Millions
Dec. 31, 2019
USD ($)
Entity
Dec. 31, 2018
USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]    
Number of consolidated VIEs | Entity 3  
Debt of unconsolidated joint ventures | $ $ 943 $ 955