CONSOLIDATED BALANCE SHEET (PARENTHETICALS) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
CURRENT ASSETS:
Allowance for doubtful accounts	$ 219	$ 157
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, accumulated depreciation	34,676	34,253
Customer relationships, accumulated amortization	$ 14,875	$ 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)	13,109,385	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)	173,764,131	172,741,236
Common stock, shares outstanding (shares)	160,654,746	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