v3.23.1
Segments - Segment Reporting Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Dayrate revenue $ 358.7 $ 205.8 $ 265.2
Related party revenue 85.1 39.5 42.3
Intersegment revenue   0.0 0.0
Gain on disposals 4.2 1.2 19.0
Rig operating and maintenance expenses (264.9) (180.5) (270.4)
Intersegment expenses   0.0 0.0
Depreciation of non-current assets (116.5) (119.6) (117.9)
Impairment of non-current assets (131.7)   (77.1)
General and administrative expenses (36.8) (34.7) (49.1)
Income from equity method investments 1.2 16.1 9.5
Operating (loss)/income including equity method investment (100.7) (72.2) (178.5)
Total assets 3,001.7 3,080.3 3,171.1
Operating segments | Dayrate      
Segment Reporting Information [Line Items]      
Dayrate revenue 600.0 205.8 265.2
Related party revenue 0.0 39.5 42.3
Gain on disposals 0.0 0.0 0.0
Rig operating and maintenance expenses (501.2) (339.7) (437.4)
Depreciation of non-current assets (114.9) (117.6) (116.0)
Impairment of non-current assets (131.7)   (77.1)
General and administrative expenses 0.0 0.0 0.0
Income from equity method investments 0.0 0.0 0.0
Operating (loss)/income including equity method investment (147.8) (123.5) (143.4)
Total assets 3,287.9 3,277.6 3,368.3
Operating segments | IWS      
Segment Reporting Information [Line Items]      
Dayrate revenue   301.6 386.2
Related party revenue   0.0 0.0
Gain on disposals   0.0 0.0
Rig operating and maintenance expenses   (186.3) (167.9)
Depreciation of non-current assets   0.0 0.0
Impairment of non-current assets     0.0
General and administrative expenses   0.0 0.0
Income from equity method investments   0.0 0.0
Operating (loss)/income including equity method investment   26.8 38.7
Total assets   0.0 336.5
Intersegment eliminations      
Segment Reporting Information [Line Items]      
Intersegment revenue   (88.5) (179.6)
Intersegment expenses   88.5 179.6
Intersegment eliminations | Dayrate      
Segment Reporting Information [Line Items]      
Intersegment revenue   88.5 179.6
Intersegment expenses   0.0 0.0
Intersegment eliminations | IWS      
Segment Reporting Information [Line Items]      
Intersegment revenue   0.0 0.0
Intersegment expenses   (88.5) (179.6)
Reconciling items      
Segment Reporting Information [Line Items]      
Dayrate revenue (241.3) (301.6) (386.2)
Related party revenue 85.1 0.0 0.0
Gain on disposals 4.2 1.2 19.0
Rig operating and maintenance expenses 236.3 345.5 334.9
Depreciation of non-current assets (1.6) (2.0) (1.9)
Impairment of non-current assets 0.0   0.0
General and administrative expenses (36.8) (34.7) (49.1)
Income from equity method investments 1.2 16.1 9.5
Operating (loss)/income including equity method investment 47.1 24.5 (73.8)
Total assets $ (286.2) $ (197.3) $ (533.7)