Loss on Impairment (Details)	1 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Feb. 05, 2021 USD ($)	Mar. 31, 2020 USD ($) floater	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Loss on impairment	$ 0		$ 0	$ 1,119,517,000
Drillships
Property, Plant and Equipment [Line Items]
Loss on impairment		$ 1,100,000,000		$ 1,100,000,000
Number of impairment oil and gas properties | floater		4
Capital Spare Equipment
Property, Plant and Equipment [Line Items]
Loss on impairment		$ 5,500,000