Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AMAK (Held-for-Sale) - Additional Information (Details)

v3.20.2
INVESTMENT IN AMAK (Held-for-Sale) - Additional Information (Details)
ر.س in Millions, $ in Millions
3 Months Ended 6 Months Ended
Mar. 26, 2020
USD ($)
shares
Mar. 26, 2020
SAR (ر.س)
Oct. 02, 2019
USD ($)
Oct. 02, 2019
SAR (ر.س)
Jun. 30, 2019
shares
Jun. 30, 2020
USD ($)
Mar. 23, 2020
Dec. 31, 2019
USD ($)
Jun. 29, 2019
Jun. 30, 1986
ر.س / $
AMAK                    
Schedule of Equity Method Investments [Line Items]                    
Percentage of ownership 33.30%         28.30%   33.30%    
Investment in equity method investment           $ 29.2   $ 32.9    
Amount of investment sold     $ 70.0 ر.س 264.7            
Non-refundable deposit of amount sold, percentage     5.00% 5.00%            
Non-refundable deposit of amount sold     $ 3.5              
Amount of non-refundable deposit forfeited after long stop date, percentage     50.00%       100.00%      
Proceeds from sale of investment $ 10.7 ر.س 40.0                
Percentage of non-refundable deposit forfeited prior to long stop date             50.00%      
Equity method investment, shares sold (in shares) | shares 4,000,000                  
Proceeds from sales deposit of equity method investments $ 0.5                  
Deposits forfeited           $ 1.5        
Exchange rate | ر.س / $                   3.75
Chief Executive Officer | AMAK                    
Schedule of Equity Method Investments [Line Items]                    
Percentage of ownership         33.30%       33.40%  
Shares of equity transferred to related party (in shares) | shares         100,000          
Foreign Tax Authority                    
Schedule of Equity Method Investments [Line Items]                    
Income taxes payable $ 0.3