CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenues	[1]	$ 729,032	$ 550,463
Costs and Expenses:
Cost of operations		616,033	475,459
Selling, general and administrative expenses		38,328	51,676
Impairment loss		32,311
Gains on asset disposals			(367)
Restructuring expenses		6,367	10,389
Total costs and expenses		693,039	537,157
Operating income	[2]	35,993	13,306
Other income (expense):
Interest expense, net		(11,238)	(12,179)
Loss on foreign currency, net		(3,183)	(1,468)
Other expense, net		(208)	(97)
Total other expense		(14,629)	(13,744)
Income (loss) before provision for income taxes		21,364	(438)
Provision for income taxes		19,330	4,869
Income (loss) before loss from investments in unconsolidated affiliates		2,034	(5,307)
Loss from investments in unconsolidated affiliates		(4,478)	(6,741)
Net loss		(2,444)	(12,048)
Less: Net income (loss) attributable to noncontrolling interest		(272)	2,459
Net loss attributable to McDermott International, Inc.		$ (2,172)	$ (14,507)
Net loss attributable to McDermott International, Inc.
Basic:		$ (0.01)	$ (0.06)
Diluted:		$ (0.01)	$ (0.06)
Shares used in the computation of loss per share:
Basic:		239,137,912	237,504,719
Diluted:		239,137,912	237,504,719

[1] Intersegment transactions included in revenues were not significant for either of the periods presented.

[2] The AEA segment’s operating loss for the three months ended March 31, 2016 includes an impairment charge of $32 million related to the Agile vessel. The ASA segment’s operating loss for the three months ended March 31, 2015 includes an impairment charge of $4 million related to the DB101.