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Receivables, Net
 12 Months Ended
Dec. 31, 2020
Receivables [Abstract]  
Receivables, Net Receivables, Net
As of December 31,
20202019
(In $ millions)
Trade receivables - third party and affiliates803 859 
Allowance for doubtful accounts - third party and affiliates(11)(9)
Trade receivables - third party and affiliates, net792 850 
As of December 31,
20202019
(In $ millions)
Non-income taxes receivable267 203 
Reinsurance receivables12 16 
Income taxes receivable100 27 
Other71 85 
Non-trade receivables, net450 331