Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2018

Revenue Recognition

Summary of revenue is disaggregation by geographical region

	Three Months Ended
	March 31, 2018
	(in thousands)
		U.S. Drilling		Canada Drilling		International Drilling		Drilling Solutions		Rig Technologies		Other		Total
	(In thousands)
Lower 48	$	204,592	$	—	$	—	$	44,273	$	50,597	$	—	$	299,462
U.S. Offshore Gulf of Mexico		20,991		—		—		3,299		—		—		24,290
Alaska		15,419		—		—		566		136		—		16,121
Canada		—		31,887		—		2,290		3,391		—		37,568
Middle East & Asia		—		—		233,857		7,725		5,208		—		246,790
Latin America		—		—		83,883		3,984		1,658		—		89,525
Europe, Africa & CIS		—		—		51,105		511		3,679		—		55,295
Eliminations & other		—		—		—		—		—		(34,857)		(34,857)
As of March 31, 2018	$	241,002	$	31,887	$	368,845	$	62,648	$	64,669	$	(34,857)	$	734,194

	Three Months Ended
	March 31, 2017
	(in thousands)
		U.S. Drilling		Canada Drilling		International Drilling		Drilling Solutions		Rig Technologies		Other		Total
	(In thousands)
Lower 48	$	137,223	$	—	$	—	$	22,318	$	38,659	$	—	$	198,200
U.S. Offshore Gulf of Mexico		13,306		—		—		85		—		—		13,391
Alaska		11,405		—		—		1,131		126		—		12,662
Canada		—		27,808		—		1,983		1,976		—		31,767
Middle East & Asia		—		—		196,260		1,303		3,315		—		200,878
Latin America		—		—		93,444		516		—		—		93,960
Europe, Africa & CIS		—		—		48,519		29		—		—		48,548
Eliminations & other		—		—		—		—		—		(36,856)		(36,856)
As of March 31, 2017	$	161,934	$	27,808	$	338,223	$	27,365	$	44,076	$	(36,856)	$	562,550

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 March 31, 2018	$	772.0	$	66.7	$	36.5	$	202.7	$	106.0