Segments and Geographic Area Analysis (Tables)

6 Months Ended

Jun. 30, 2011

Segments and Geographic Area Analysis [Abstract]

Revenues from contract drilling services by equipment-type

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
	(In thousands)
High-Specification Floaters	$	452,289	$	340,387	$	813,355	$	724,175
Intermediate Semisubmersibles		356,840		389,094		736,339		769,795
Jack-ups		60,512		82,223		108,730		162,172
Other		5		35		95		35
Total contract drilling revenues		869,646		811,739		1,658,519		1,656,177
Revenues related to reimbursable expenses		19,850		10,864		37,366		26,107
Total revenues	$	889,496	$	822,603	$	1,695,885	$	1,682,284

Revenues by geographic area presented by attributing revenues to individual country

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2011		2010		2011		2010
	(In thousands)
United States	$	101,221	$	189,019	$	151,495	$	427,566
International:
South America		441,221		312,207		885,324		595,323
Australia/Asia/Middle East		118,454		142,463		223,122		301,392
Europe/Africa/Mediterranean		209,102		140,078		399,150		276,683
Mexico		19,498		38,836		36,794		81,320
Total revenues	$	889,496	$	822,603	$	1,695,885	$	1,682,284