CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net income	$ 151,355	$ 227,712	$ 390,450
Other comprehensive income (loss), net of tax:
Amortization of benefit plan costs	18,538	44,322	59,413
Unrealized gain (loss) on benefit plan revaluation	44,828	(21,612)	(41,066)
Unrealized gain (loss) on investments	(93)	2,440	1,993
Realized loss on investments	20	91	124
Translation adjustments	(5,550)	(23,252)	29,607
Unrealized gain on derivatives	4,505	606	11,403
Realized (gain) loss on derivatives	171	2,229	(1,855)
Other comprehensive income, net of tax	62,419	4,824	59,619
Total Comprehensive Income	213,774	232,536	450,069
Less: Comprehensive Income Attributable to Noncontrolling Interests	13,357	26,046	3,595
Comprehensive Income Attributable to McDermott International, Inc.	$ 200,417	$ 206,490	$ 446,474