CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Revenues	$ 603,811	$ 807,488
Costs and Expenses:
Cost of operations	591,493	712,814
Selling, general and administrative expenses	55,397	52,226
Gain on asset disposals	(6,439)	(14,716)
Restructuring charges	6,125
Total costs and expenses	646,576	750,324
Equity in Earnings (Loss) of Unconsolidated Affiliates	1,123	(4,131)
Operating Income (Loss)	(41,642)	53,033
Other Income (Expense):
Interest income	61	342
Loss on foreign currency-net	(4,082)	(2,526)
Other income (expense)-net	(265)	782
Total other income (expense)	(4,286)	(1,402)
Income (loss) before provision for income taxes and noncontrolling interests	(45,928)	51,631
Provision for Income Taxes	3,489	27,313
Net Income (Loss)	(49,417)	24,318
Less: Net Income Attributable to Noncontrolling Interests	536	3,765
Net Income (Loss) Attributable to McDermott International, Inc.	$ (49,953)	$ 20,553
Basic:
Income (loss) from operations, less noncontrolling interests	$ (0.21)	$ 0.09
Net income (loss) attributable to McDermott International, Inc.	$ (0.21)	$ 0.09
Diluted:
Income (loss) from operations, less noncontrolling interests	$ (0.21)	$ 0.09
Net income (loss) attributable to McDermott International, Inc.	$ (0.21)	$ 0.09
Shares used in the computation of earnings per share:
Basic	236,961,158	235,941,185
Diluted	236,961,158	239,199,881