CONSOLIDATED BALANCE SHEET (PARENTHETICALS) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS:
Accounts receivable, allowance for doubtful accounts	$ 124	$ 21
INVESTMENT IN CABLE PROPERTIES:
Property, plant and equipment, accumulated depreciation	$ 11,103	$ 6,518
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	250,000,000	250,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	900,000,000	900,000,000
Common stock, shares issued (in shares)	268,897,792	112,438,828
Common stock, shares outstanding (in shares)	268,897,792	112,438,828
Class B Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	1,000	25,000,000
Common stock, shares issued (in shares)	1	0
Common stock, shares outstanding (in shares)	1	0