Segments and Geographic Area Analysis - Summary of Information about Disaggregated Revenue by Primary Geographical Market (Parenthetical) (Detail) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018 USD ($) Rig	Jun. 30, 2018 USD ($) Rig
United States [Member] \| Jack-up Rigs [Member]
Segment Reporting Information [Line Items]
Proceeds from loss-of-hire insurance related to early contract terminations \| $	$ 3.6	$ 8.4
MEXICO
Segment Reporting Information [Line Items]
Number of Jackup Rigs \| Rig	2	2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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