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Basis of Presentation - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Jan. 21, 2020
Apr. 18, 2018
Mar. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Cumulative effect of new accounting principle in period of adoption         $ (7)
Accumulated Deficit          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Cumulative effect of new accounting principle in period of adoption         $ (7)
Accumulated Deficit | Accounting Standards Update 2016-13 [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Cumulative effect of new accounting principle in period of adoption       $ (7)  
Share and asset purchase agreement [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Amount paid to acquire bid     $ 2,725    
Deposited in third-party escrow account     $ 200    
Maximum [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Percent of voting shares of successor entity received by predecessor holders     50.00%    
Senior Notes [Member]          
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]          
Debt instrument interest rate 10.625% 10.625%      
Debt Instrument maturity year 2024