Property and Equipment (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 28, 2019	Feb. 28, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			$ 8,749,255,000		$ 8,749,255,000		$ 10,306,625,000
Loss on impairment			0	$ 595,510,000	1,119,517,000	$ 595,510,000
2019 Seller Loan
Property, Plant and Equipment [Line Items]
Financed value	$ 53,600,000	$ 53,600,000
Other | 2019 Seller Loan
Property, Plant and Equipment [Line Items]
Cash paid to acquire asset	30,200,000
Drilling equipment and facilities
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			8,465,303,000		8,465,303,000		10,014,314,000
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			81,186,000		81,186,000		88,904,000
Other
Property, Plant and Equipment [Line Items]
Property and equipment, at cost			$ 202,766,000		$ 202,766,000		$ 203,407,000
Noble Joe Knight
Property, Plant and Equipment [Line Items]
Purchase price of asset acquired	$ 83,800,000	$ 83,800,000