Acquisitions and Divestitures - Proposed Business Combination with Maersk Drilling (Details) $ / shares in Units, $ in Millions	Mar. 31, 2022 $ / shares	Dec. 31, 2021 $ / shares	Nov. 10, 2021 USD ($) member $ / shares
Business Acquisition [Line Items]
Common stock, par value (in usd per share)	$ 0.00001	$ 0.00001
Number of board of directors | member			7
Maersk Drilling Merger
Business Acquisition [Line Items]
Business combination, percentage of issued and outstanding shares acquired upon consummation			90.00%
Business combination, percentage of acquirer's shareholder for approval (at least)			80.00%
Business combination, Minimum Acceptance Condition, percentage of outstanding shares tendering			80.00%
Business combination, shares exchange ratio			1.6137
Business combination, consideration in cash election per share (in USD per share)			$ 1,000
Business combination, consideration in cash election amount | $			$ 50
Maersk Drilling Merger | Minimum
Business Acquisition [Line Items]
Business combination, Minimum Acceptance Condition, percentage of outstanding shares tendering			70.00%
Topco
Business Acquisition [Line Items]
Common stock, par value (in usd per share)			$ 0.00001
Maersk Drilling
Business Acquisition [Line Items]
Common stock, par value (in usd per share)			$ 10
Number of board of directors | member			3
Maersk Drilling Former Shareholders | Maersk Drilling Merger | Topco
Business Acquisition [Line Items]
Ownership percentage at closing of Merger			50.00%
Noble Corp
Business Acquisition [Line Items]
Common stock, par value (in usd per share)			$ 0.00001
Number of board of directors | member			3
Noble Corp | Maersk Drilling Merger | Topco
Business Acquisition [Line Items]
Ownership percentage at closing of Merger			50.00%