Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Summary of Significant Accounting Policies

Property, Plant and Equipment

	December 31, 2016		December 31, 2015
	amounts in millions
Computer equipment	$	428	24
Land		134	3
Building and leasehold improvements		68	15
Machinery, furniture and other equipment		43	14
Construction in progress		225	—
		898	56
Accumulated depreciation		(54)	(26)
	$	844	30

Schedule of allocation of stock-based compensation

	Years ended December 31,
	2016		2015	2014
	amounts in millions
Operating costs and expenses:
Operating expense	$	3	—	—
Selling and marketing		10	—	—
Technology and content		13	—	—
General and administrative		21	2	2
	$	47	2	2

Schedule of potentially dilutive equity awards

	Years ended December 31,
	2016	2015	2014
	number of shares in millions
Basic WASO	57	57	57
Potentially dilutive shares	1	—	—
Diluted WASO	58	57	57