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CONSOLIDATED BALANCE SHEET (PARENTHETICALS) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
CURRENT ASSETS:    
Allowance for doubtful accounts $ 161 $ 157
INVESTMENT IN CABLE PROPERTIES:    
Property, plant and equipment, accumulated depreciation 34,897 34,253
Customer relationships, accumulated amortization $ 14,542 $ 14,180
Preferred stock, par value (dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (shares) 250,000,000 250,000,000
Preferred stock, shares issued (shares) 0 0
Preferred stock, shares outstanding (shares) 0 0
Treasury stock, shares (shares) 5,739,096 0
Class A Common Stock    
Common stock, par value (dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (shares) 900,000,000 900,000,000
Common stock, shares issued (shares) 173,597,377 172,741,236
Common stock, shares outstanding (shares) 167,858,281 172,741,236
Class B Common Stock    
Common stock, par value (dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (shares) 1,000 1,000
Common stock, shares issued (shares) 1 1
Common stock, shares outstanding (shares) 1 1