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Summary of Significant Accounting Policies Discussion Textuals (Details) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Nov. 28, 2017
Apr. 01, 2017
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2016
Jan. 01, 2019
Apr. 02, 2017
Maximum | Buildings and improvements              
Summary of Significant Accounting Policies Textuals              
Estimated useful life       27      
Maximum | Machinery and equipment              
Summary of Significant Accounting Policies Textuals              
Estimated useful life       27      
Successor              
Summary of Significant Accounting Policies Textuals              
Period considered to treat short-term, highly liquid investments as cash equivalents       three months or less      
Other-than-temporary impairment losses on equity and cost method investments     $ 0 $ 0      
Recognition of tax benefits from uncertain tax positions       greater than fifty percent likelihood of being realized upon ultimate settlement      
Restructuring charges for voluntary and involuntary workforce reductions $ 3,000,000   7,600,000 $ 1,200,000      
Asset impairment charges related to long-lived assets       0      
Foreign currency remeasurement gain (loss)     700,000 1,400,000      
Foreign currency translation adjustment     1,400,000 (5,900,000)      
Interest Costs Capitalized     0 0      
Equity Method Investment, Other than Temporary Impairment     0 0      
Asset impairment     $ 0 $ 0      
Successor | Equity method investment and financing receivables related to Middlemount              
Summary of Significant Accounting Policies Textuals              
Ownership percentage of equity method investment       50.00%      
Successor | Buildings and improvements              
Summary of Significant Accounting Policies Textuals              
Estimated useful life       up to 27      
Successor | Machinery and equipment              
Summary of Significant Accounting Policies Textuals              
Estimated useful life       up to 27      
Successor | Leasehold improvements [Member]              
Summary of Significant Accounting Policies Textuals              
Estimated useful life       Shorter of Useful Life or Remaining Life of Lease      
Successor | Treasury Stock              
Summary of Significant Accounting Policies Textuals              
Voting Shares Received Upon Reorganization, Percent             50.00%
Predecessor              
Summary of Significant Accounting Policies Textuals              
Restructuring charges for voluntary and involuntary workforce reductions   $ 0     $ 15,500,000    
Asset impairment charges related to long-lived assets   30,500,000     247,900,000    
Foreign currency remeasurement gain (loss)   10,600,000     (7,400,000)    
Foreign currency translation adjustment   5,500,000     (1,800,000)    
Interest Costs Capitalized   0     0    
Equity Method Investment, Other than Temporary Impairment   0     0    
Asset impairment   $ 30,500,000     $ 247,900,000    
Scenario, Forecast | Minimum              
Summary of Significant Accounting Policies Textuals              
Operating Lease, Liability           $ 100,000,000  
Scenario, Forecast | Maximum              
Summary of Significant Accounting Policies Textuals              
Operating Lease, Liability           $ 200,000,000