Jack-Up Rigs - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Jack Up Rigs [Abstract]
Accumulated depreciation, jack-up rigs	$ 538.0		$ 538.0		$ 482.6
Depreciation related to property, plant and equipment	$ 0.4	$ 0.4	$ 0.8	$ 0.8

Accumulated Depreciation, Depletion and Amortization, Jack-Up Rigs

No definition available.

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Namespace Prefix:	borr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant