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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
1 Months Ended 11 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 13, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]        
Depreciation $ 25 $ 386 $ 493 $ 749
Buildings and Improvements, Gross 571   1,303  
Rental and Service Equipment 1,296   4,869  
Machinery and Equipment, Gross 280   1,700  
Property, Plant and Equipment, Gross 2,147   7,872  
Less: Accumulated Depreciation 25   5,786  
Property, Plant and Equipment, Net $ 2,122   $ 2,086