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Noncontrolling Interest (Tables)
 9 Months Ended
Sep. 30, 2019
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 nine months ended September 30, 2019 and 2018.

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Number of units purchased
864,826

 
495,447

 
1,615,561

 
1,546,475

Average price per unit
$
391.62

 
$
292.81

 
$
366.76

 
$
306.11

Amount of units purchased
$
339

 
$
145

 
$
593

 
$
473

Decrease in noncontrolling interest based on carrying value
$
(215
)
 
$
(122
)
 
$
(400
)
 
$
(376
)
Decrease in additional paid-in-capital, net of tax
$
(93
)
 
$
(17
)
 
$
(145
)
 
$
(73
)
Schedule of effects on statement of shareholders' equity due to ownership changes
Total shareholders' equity was also adjusted during the three and nine months ended September 30, 2019 and 2018 due to the changes in Charter Holdings' ownership as follows.

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Decrease in noncontrolling interest
$
(87
)
 
$
(10
)
 
$
(139
)
 
$
(53
)
Increase in additional paid-in-capital, net of tax
$
65

 
$
7

 
$
104

 
$
39