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Income Taxes (Tables)
6 Months Ended
Jun. 30, 2020
Income Tax Disclosure [Abstract]  
Summary of Income Tax Examinations The following table lists the earliest tax years open to examination by tax authorities where we have significant operations:
 
 
 
 
Jurisdiction  
 
Periods
United States
 
2014
United Kingdom
 
2018
Norway
 
2015
Angola
 
2013
Brazil
 
2015