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Jack-Up Rigs (Tables)
 6 Months Ended
Jun. 30, 2023
Jack Up Rigs [Abstract]  
Schedule of Jack-Up Rigs
June 30, 2023December 31, 2022
(In $ millions)
Opening balance2,589.1 2,730.8 
Additions65.2 100.2 
Depreciation and amortization(55.4)(114.9)
Disposals— (119.7)
Impairment— (7.3)
Total2,598.9 2,589.1