Segments and Geographic Area Analysis (Tables)

12 Months Ended

Dec. 31, 2015

Revenues from Contract Drilling Services by Equipment Type

Revenues from contract drilling services by equipment-type are listed below:


	Year Ended December 31,
	2015		2014		2013
	(In thousands)
Floaters:
Ultra-Deepwater	$	1,339,059	$	987,565	$	854,515
Deepwater		548,667		494,247		617,080
Mid-Water		387,549		1,076,842		1,197,934

Total Floaters		2,275,275		2,558,654		2,669,529
Jack-ups		84,909		178,472		174,055

Total contract drilling revenues		2,360,184		2,737,126		2,843,584
Revenues related to reimbursable expenses		59,209		77,545		76,837

Total revenues	$	2,419,393	$	2,814,671	$	2,920,421

Revenues by Geographic Area Presented by Attributing Revenues to Individual Country

Revenues by geographic area are presented by attributing revenues to the individual country or areas where the services were performed.


	Year Ended December 31,
	2015		2014		2013
	(In thousands)
United States	$	513,605	$	418,095	$	330,471

International:
South America		812,271		1,088,796		1,219,287
Europe/Africa/Mediterranean		532,824		558,367		731,888
Australia/Asia		415,033		503,814		438,814
Mexico		145,660		245,599		199,961

		1,905,788		2,396,576		2,589,950

Total revenues	$	2,419,393	$	2,814,671	$	2,920,421

Individual Countries that Comprised 5% or More of Our Total Contract Drilling Revenues from Unaffiliated Customers

For the years ended December 31, 2015, 2014 and 2013, individual countries that comprised 5% or more of our total contract drilling revenues from unaffiliated customers are listed below.


	Year Ended December 31,
	2015			2014			2013
Brazil		23.1	%		31.0	%		38.3	%
United Kingdom		11.4	%		10.7	%		7.9	%
Trinidad		9.8	%		4.0	%		1.7	%
Romania		9.7	%		3.9	%		—
Australia		7.0	%		6.4	%		3.2	%
Malaysia		6.8	%		5.5	%		2.9	%
Mexico		6.0	%		8.7	%		6.9	%

Long-Lived Tangible Assets by Geographic Location

The following table presents our long-lived tangible assets by geographic location as of December 31, 2015, 2014 and 2013. A substantial portion of our assets is comprised of rigs that are mobile, and therefore asset locations at the end of the period are not necessarily indicative of the geographic distribution of the earnings generated by such assets during the periods and may vary from period to period due to the relocation of rigs. In circumstances where our drilling rigs were in transit at the end of a calendar year, they have been presented in the tables below within the geographic area in which they were expected to operate.


	December 31,
	2015 ⁽¹⁾		2014		2013
	(In thousands)
Drilling and other property and equipment, net:
United States ⁽²⁾	$	3,292,474	$	2,637,621	$	611,731

International:
Australia/Asia/Middle East⁽³⁾		1,224,089		1,460,841		2,078,348
South America		1,051,283		1,445,832		1,690,976
Europe/Africa/Mediterranean		664,520		1,128,857		793,097
Mexico		146,448		272,802		293,075

		3,086,340		4,308,332		4,855,496

Total	$	6,378,814	$	6,945,953	$	5,467,227

⁽¹⁾

During 2015, we recorded an aggregate impairment loss of $860.4 million to write down certain of our drilling rigs with indicators of impairment to their estimated recoverable amounts.

⁽²⁾

Long-lived tangible assets in the United States region as of December 31, 2015 and December 31, 2014 included $2.6 billion and $1.9 billion, respectively, related to our newbuild drillships, three of which were located in GOM waters in 2014 and the fourth of which arrived in 2015.

⁽³⁾

Long-lived tangible assets in the Australia/Asia/Middle East region include $270.0 million, $439.2 million and $1,064.5 million in construction work-in-progress for rigs under construction in South Korea as of December 31, 2015, 2014 and 2013, respectively.

Countries Where Parent Company had Material Concentration of Operating Assets

The following table presents the countries in which material concentrations of our long-lived tangible assets were located as of December 31, 2015, 2014 and 2013:


	December 31,
	2015			2014			2013
United States		51.6	%		38.0	%		11.2	%
Brazil Malaysia		15.3 10.4	% %		20.3 6.6	% %		30.2 4.3	% %
South Korea		4.2	%		6.3	%		19.5	%
Spain		2.7	%		8.1	%		1.2	%
Mexico		2.3	%		3.9	%		5.4	%
Vietnam		—			6.9	%		0.6	%
Singapore		—			—			8.2	%
Angola		—			—			6.3	%
Indonesia		—			—			5.2	%

Revenues from Major Customers that Contributed More than 10% of Total Revenues

Revenues from our major customers for the years ended December 31, 2015, 2014 and 2013 that contributed more than 10% of our total revenues are as follows:


	Year Ended December 31,
Customer	2015			2014			2013
Petróleo Brasileiro S.A.		24.1	%		31.9	%		33.6	%
ExxonMobil		12.4	%		5.0	%		—
Anadarko		12.4	%		3.6	%		—