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Long-term Employee-related Obligations (Tables)
12 Months Ended
Dec. 31, 2020
Schedule of Long Term Employee Related Obligation
a.
Long-term employee-related obligations consisted of the following:
 
    
December 31,
 
    
2020
    
2019
 
    
(U.S. $ in millions)
 
Accrued severance obligations
   $ 82      $ 76  
Defined benefit plans
     192        165  
    
 
 
    
 
 
 
Total
   $ 275      $ 241