Commitments and Contingencies - Litigation (Details) $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2011 USD ($)	Jun. 30, 2021 USD ($)	Dec. 31, 2018 USD ($)
Court of Ouargla Algeria Foreign Currency Controls
Commitments and Contingencies, Disclosure
Litigation amount as per judgment	$ 21.0
Payment of contract amount in foreign currency	7.5
Payment of contract amount in domestic currency	$ 3.2
Approximate multiplier of the amount at issue for fines and penalties		4
Court of Ouargla Algeria Foreign Currency Controls | Maximum
Commitments and Contingencies, Disclosure
Potential judgment in excess of accrual		$ 13.0
KMG Nabors Drilling Company Joint Venture | Atyrau Oblast Ecology Department
Commitments and Contingencies, Disclosure
Administrative fines			$ 0.8
KMG Nabors Drilling Company Joint Venture | Atyrau Oblast Ecology Department | Minimum
Commitments and Contingencies, Disclosure
Environmental damages			$ 3.4