CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Revenues	$ 889,248	[1]	$ 849,801	[1]	$ 1,616,926	[1]	$ 1,749,041	[1]
Costs and Expenses:
Cost of operations	759,704		703,805		1,357,138		1,451,030
Selling, general and administrative expenses	47,482		60,412		94,093		115,781
(Gain) loss on asset disposals	29		(71)		(197)		(296)
Total costs and expenses	807,215		764,146		1,451,034		1,566,515
Equity in Income (Loss) of Unconsolidated Affiliates	(2,651)		(1,876)		(6,334)		1,551
Operating Income	79,382		83,779		159,558		184,077
Other Income (Expense):
Interest income	1,585		292		3,219		741
Interest expense			(263)				(263)
Gain (loss) on foreign currency-net	1,256		1,372		10,697		(2,860)
Other income (expense)-net	51		(117)		(530)		(1,288)
Total other income (expense)	2,892		1,284		13,386		(3,670)
Income from continuing operations before provision for income taxes and noncontrolling interests	82,274		85,063		172,944		180,407
Provision for Income Taxes	28,345		17,237		57,088		39,816
Income from continuing operations before noncontrolling interests	53,929		67,826		115,856		140,591
Gain on disposal of discontinued operations					257
Income from discontinued operations, net of tax			3,610		3,240		5,272
Total income from discontinued operations, net of tax			3,610		3,497		5,272
Net Income	53,929		71,436		119,353		145,863
Less: Net Income Attributable to Noncontrolling Interests	1,190		4,108		3,856		8,115
Net income attributable to McDermott International, Inc.	$ 52,739		$ 67,328		$ 115,497		$ 137,748
Basic:
Income from continuing operations, less noncontrolling interests	$ 0.22		$ 0.27		$ 0.48		$ 0.57
Income from discontinued operations, net of tax			$ 0.02		$ 0.01		$ 0.02
Net income attributable to McDermott International, Inc.	$ 0.22		$ 0.29		$ 0.49		$ 0.59
Diluted:
Income from continuing operations, less noncontrolling interests	$ 0.22		$ 0.27		$ 0.47		$ 0.56
Income from discontinued operations, net of tax			$ 0.02		$ 0.01		$ 0.02
Net income attributable to McDermott International, Inc.	$ 0.22		$ 0.28		$ 0.49		$ 0.58
Shares used in the computation of earnings per share:
Basic	235,681,213		234,573,031		235,444,733		234,207,053
Diluted	237,460,765		237,544,674		237,396,697		237,145,126

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