Drilling and Other Property and Equipment - Summary of Construction Work-in-Progress, Including Capitalized Interest (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Rig(s) Under Construction	$ 1,668,211	$ 990,964
Ultra-deepwater drillships [Member]
Property, Plant and Equipment [Line Items]
Rig(s) Under Construction	868,908	741,059
Ocean GreatWhite [Member] | Ultra-deepwater semisubmersible [Member]
Property, Plant and Equipment [Line Items]
Rig(s) Under Construction	195,578
Ocean Onyx [Member] | Deepwater semisubmersibles [Member]
Property, Plant and Equipment [Line Items]
Rig(s) Under Construction	339,129	167,403
Ocean Apex [Member] | Deepwater semisubmersibles [Member]
Property, Plant and Equipment [Line Items]
Rig(s) Under Construction	$ 264,596	$ 82,502