10.Segment Reporting

Operating segments are components of an enterprise for which separate financial information is available and regularly evaluated by the chief operating decision maker(s) of an enterprise. Operating income is the primary measure used by our chief operating decision maker to evaluate segment operating performance. We currently operate two primary business segments: (1) Pay-TV; and (2) Wireless. See Note 1 for further information.

All other and eliminations primarily include intersegment eliminations related to intercompany debt and the related interest income and interest expense, which are eliminated in consolidation.

The total assets, revenue and operating income by segment were as follows:


	As of
	June 30,		December 31,
	2018		2017
	(In thousands)
Total assets:
Pay-TV	$	28,125,561	$	28,353,581
Wireless		23,892,140		23,377,088
Eliminations		(22,367,689)		(21,956,903)
Total assets	$	29,650,012	$	29,773,766


	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
	(In thousands)
Revenue:
Pay-TV	$	3,460,845	$	3,643,632	$	6,919,332	$	7,323,993
Wireless		—		—		—		—
Eliminations		—		—		—		—
Total revenue	$	3,460,845	$	3,643,632	$	6,919,332	$	7,323,993

Operating income (loss):
Pay-TV	$	581,323	$	262,919	$	1,120,625	$	884,584
Wireless (1)		(8,663)		(10,816)		(18,459)		(25,161)
Eliminations		—		—		—		—
Total operating income (loss)	$	572,660	$	252,103	$	1,102,166	$	859,423

(1)

Operating income (loss) for the wireless segment was positively impacted for the three and six months ended June 30, 2018 by a decrease in depreciation expense associated with the T1 satellite, which was impaired during the fourth quarter 2017.

Geographic Information. Revenue is attributed to geographic regions based upon the location where the goods and services are provided. All subscriber-related revenue was derived from the United States. Substantially all of our long-lived assets reside in the United States.

The following table summarizes revenue by geographic region:


	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
Revenue:	2018		2017		2018		2017
	(In thousands)
United States	$	3,450,809	$	3,632,203	$	6,899,825	$	7,302,967
Canada and Mexico		10,036		11,429		19,507		21,026
Total revenue	$	3,460,845	$	3,643,632	$	6,919,332	$	7,323,993

The revenue from external customers disaggregated by major revenue source was as follows:


	For the Three Months Ended				For the Six Months Ended
	June 30,				June 30,
Category:	2018		2017		2018		2017
	(In thousands)
Pay-TV video and related revenue	$	3,352,354	$	3,512,900	$	6,699,951	$	7,049,362
Broadband revenue		67,406		101,379		142,513		209,003
Equipment sales and other revenue		41,085		29,353		76,868		65,628
Total	$	3,460,845	$	3,643,632	$	6,919,332	$	7,323,993

All revenues during the three and six months ended June 30, 2018 were derived from our Pay-TV segment.