Accumulated Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accumulated other comprehensive loss net of deferred taxes
Foreign currency translation adjustments	$ (12,302)	$ (9,736)
Gain (loss) on derivatives	(3,061)	1,970	417
Deferred pension amounts	(58,958)	(42,454)
Accumulated Other comprehensive loss, net	(74,321)	(50,220)
Other comprehensive loss, net attributable to Noble Corporation	(74,138)	(50,403)
Parent [Member]
Accumulated other comprehensive loss net of deferred taxes
Accumulated Other comprehensive loss, net	(74,321)	(50,220)
Noncontrolling Interests [Member]
Accumulated other comprehensive loss net of deferred taxes
Less: Noncontrolling interest portion of gain (loss) on interest rate swaps	183	(183)
Interest Rate Swaps [Member] | Parent [Member]
Accumulated other comprehensive loss net of deferred taxes
Gain (loss) on derivatives	0	366
Foreign currency forward contracts [Member]
Accumulated other comprehensive loss net of deferred taxes
Gain (loss) on derivatives	$ (3,061)	$ 1,604