Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2017

Schedule of stock-based compensation expense

	Three months ended			Nine months ended
	September 30,			September 30,
	2017		2016	2017	2016
	amounts in millions
Operating costs and expenses:
Operating expense	$	3	—	10	—
Selling and marketing		13	—	39	—
Technology and content		19	—	53	—
General and administrative		(60)	1	(10)	—
	$	(25)	1	92	—

Common Series A

Schedule of share based compensation activity

				Weighted
				average		Aggregate
				remaining		intrinsic
	Series A	WAEP		contractual life		value
	(in thousands)					(in millions)
Outstanding at January 1, 2017	1,317	$	24.46
Granted	—	$	—
Exercised	(298)	$	18.08
Forfeited/Cancelled	(8)	$	41.89
Outstanding at September 30, 2017	1,011	$	26.21	2.9	years	$	27
Exercisable at September 30, 2017	755	$	21.18	1.9	years	$	24