Revenue from Contracts with Customers (Details) $ in Millions	5 Months Ended	9 Months Ended
	May 31, 2020 USD ($) drilling_rigs	Sep. 30, 2020 drilling_rigs
Drilling Services [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Drilling Rigs		25
Drilling Services [Member] | Deployed under new contract during current period [Member] | Daywork Drilling Contract [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Drilling Rigs		4
Drilling Services [Member] | Domestic Drilling [Member] | Earning But Not Working [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Gain (Loss) on Contract Termination | $	$ 1.6
Drilling Services [Member] | Domestic Drilling [Member] | Earning But Not Working [Member] | Currently Under Drilling Contract [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Drilling Rigs		3
Drilling Services [Member] | Domestic Drilling [Member] | Earning But Not Working [Member] | Not Under Drilling Contract [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Drilling Rigs	1
Drilling Services [Member] | International Drilling [Member] | Colombia [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Drilling Rigs		8
Short-term Contract with Customer [Member] | Maximum [Member] | Production Services [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Typical Revenue Contract Duration		30 days