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Noncontrolling Interest (Tables)
6 Months Ended
Jun. 30, 2020
Noncontrolling Interest [Abstract]  
Schedule of Noncontrolling Interest Purchased
The following table represents Charter Holdings' purchase of Charter Holdings common units from A/N pursuant to the Letter Agreement (see Note 18) and the effect on total shareholders' equity during the three and six months ended June 30, 2020 and 2019.

Three Months Ended June 30, Six Months Ended June 30,
2020201920202019
Number of units purchased280,069  447,793  1,075,676  750,735  
Average price per unit$445.15  $358.21  $481.68  $338.12  
Amount of units purchased$125  $161  $518  $254  
Decrease in noncontrolling interest based on carrying value$(69) $(111) $(264) $(185) 
Decrease in additional paid-in-capital, net of tax$(42) $(37) $(191) $(52) 
Schedule of effects on statement of shareholders' equity due to ownership changes
Total shareholders' equity was also adjusted during the three and six months ended June 30, 2020 and 2019 due to the changes in Charter Holdings' ownership as follows.

Three Months Ended June 30, Six Months Ended June 30,
2020201920202019
Decrease in noncontrolling interest $(52) $(23) $(161) $(52) 
Increase in additional paid-in-capital, net of tax$41  $17  $123  $39