Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2018

Revenue Recognition

Summary of revenue is disaggregation by geographical region

	Year Ended
	December 31, 2018
		U.S. Drilling		Canada Drilling		International Drilling		Drilling Solutions		Rig Technologies		Other		Total
	(In thousands)
Lower 48	$	910,819	$	—	$	—	$	173,219	$	188,550	$	—	$	1,272,588
U.S. Offshore Gulf of Mexico		122,946		—		—		13,776		—		—		136,722
Alaska		49,462		—		—		3,670		777		—		53,909
Canada		—		105,000		—		5,849		29,682		—		140,531
Middle East & Asia		—		—		888,500		35,486		26,236		—		950,222
Latin America		—		—		360,385		15,350		8,514		—		384,249
Europe, Africa & CIS		—		—		220,153		2,892		17,229		—		240,274
Eliminations & other		—		—		—		—		—		(120,876)		(120,876)
Total	$	1,083,227	$	105,000	$	1,469,038	$	250,242	$	270,988	$	(120,876)	$	3,057,619

	Year Ended
	December 31, 2017
		U.S. Drilling		Canada Drilling		International Drilling		Drilling Solutions		Rig Technologies		Other		Total
	(In thousands)
Lower 48	$	681,669	$	—	$	—	$	118,574	$	211,609	$	—	$	1,011,852
U.S. Offshore Gulf of Mexico		75,994		—		—		1,021		—		—		77,015
Alaska		47,560		—		—		3,925		623		—		52,108
Canada		—		82,929		—		6,054		7,618		—		96,601
Middle East & Asia		—		—		875,175		7,397		13,493		—		896,065
Latin America		—		—		388,235		3,266		392		—		391,893
Europe, Africa & CIS		—		—		210,650		464		807		—		211,921
Eliminations & other		—		—		—		—		—		(173,170)		(173,170)
Total	$	805,223	$	82,929	$	1,474,060	$	140,701	$	234,542	$	(173,170)	$	2,564,285

	Year Ended
	December 31, 2016
		U.S. Drilling		Canada Drilling		International Drilling		Drilling Solutions		Rig Technologies		Other		Total
	(In thousands)
Lower 48	$	402,415	$	—	$	—	$	49,377	$	133,271	$	—	$	585,063
U.S. Offshore Gulf of Mexico		79,730		—		—		252		—		—		79,982
Alaska		71,927		—		—		3,036		555		—		75,518
Canada		—		51,472		—		4,572		8,968		—		65,012
Middle East & Asia		—		—		894,216		5,152		9,157		—		908,525
Latin America		—		—		306,042		1,157		—		—		307,199
Europe, Africa & CIS		—		—		308,632		213		—		—		308,845
Eliminations & other		—		—		—		—		—		(102,305)		(102,305)
Total	$	554,072	$	51,472	$	1,508,890	$	63,759	$	151,951	$	(102,305)	$	2,227,839

Summary of contract assets, current and long-term contract liabilities

The opening and closing balances of our receivables, contract assets and current and long-term contract liabilities are as follows (in millions):

			Contract		Contract		Contract		Contract
	Contract		Assets		Assets		Liabilities		Liabilities
	Receivables		(Current)		(Long-term)		(Current)		(Long-term)
As of December 31, 2017	$	738.0	$	67.0	$	46.9	$	218.4	$	135.0
As of December 31, 2018	$	791.2	$	55.8	$	32.3	$	116.7	$	69.7