Basis of Presentation and Nature of Operations (Details)	3 Months Ended
Mar. 31, 2013
Basis of Presentation and Nature of Operations [Abstract]
Number of fleet of self-elevating mobile offshore jack-up drilling units	31
Number of ultra-deepwater drill ships under construction	4

Number of fleet of self-elevating mobile offshore jack-up drilling units.

No definition available.

Name:	rdc_NumberOfFleetOfSelfElevatingMobileOffshoreJackUpDrillingUnits
Namespace Prefix:	rdc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration