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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2021
Income Tax Disclosure [Abstract]  
Income (loss) from operations before provision (benefit) for income taxes
The Company’s income taxes and the related effective tax rates for the three and six months ended June 30, 2021 and 2020 are as follows:
 
                                                                     
    
Three Months Ended June 30,
  
Six Months Ended June 30,
In millions
   
2021
  
2020
  
2021
  
2020
Income (loss) before income taxes
   
$
(61
) 
  
$
(106
) 
  
$
(167
) 
  
$
(439
) 
Provision (benefit) for income taxes
   
$
-
 
  
$
-
 
  
$
-
 
  
$
-
 
Effective tax rate
   
 
0.0%
 
  
 
0.0%
 
  
 
0.0%
 
  
 
0.0%