Organization and Basis of Presentation (Details)		9 Months Ended
Sep. 24, 2020 subsidiary	Sep. 30, 2021 segment jackup floater rig
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of drilling rigs (vessel) \| rig		24
Number of floaters (vessel) \| floater		12
Number of jackups (vessel) \| jackup		12
Number of reportable segments \| segment		1
Number of additional subsidiaries filed bankruptcy \| subsidiary	6

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration