Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	Apr. 23, 2021	Jun. 30, 2021	Jun. 30, 2020	Apr. 23, 2021	Jun. 30, 2020
Revenues:
Total revenues	$ 34,562	$ 114,911	$ 198,203	$ 169,379	$ 427,373
Operating expenses:
Depreciation	18,132	18,735	74,835	92,758	167,878
General and administrative	2,670	16,217	15,701	15,036	32,046
Impairment of assets				197,027	774,028
Restructuring and separation costs			17,119		17,119
Gain on disposition of assets	(85)	(176)	(220)	(5,486)	(3,653)
Total operating expenses	64,410	142,059	281,685	496,438	1,357,292
Operating loss	(29,848)	(27,148)	(83,482)	(327,059)	(929,919)
Other income (expense):
Interest income		1	108	30	498
Interest expense, net of amounts capitalized (excludes $7,124 and $24,635 of contractual interest expense on debt subject to compromise for the period from April 1, 2021 through April 23, 2021 and the three-month period ended June 30, 2020)	(2,265)	(7,097)	(10,333)	(34,827)	(42,655)
Foreign currency transaction loss	(797)	(914)	(1,004)	(172)	(797)
Reorganization items, net	(1,604,512)	(5,538)	(53,977)	(1,639,763)	(53,977)
Other, net	(90)	10,706	(81)	398	242
Loss before income tax (expense) benefit	(1,637,512)	(29,990)	(148,769)	(2,001,393)	(1,026,608)
Income tax (expense) benefit	37,204	(17,303)	3,949	39,404	19,848
Net loss	$ (1,600,308)	$ (47,293)	$ (144,820)	$ (1,961,989)	$ (1,006,760)
Loss per share, Basic and Diluted	$ (11.59)	$ (0.47)	$ (1.05)	$ (14.21)	$ (7.30)
Weighted-average shares outstanding, Basic and Diluted	138,054	100,059	138,043	138,054	137,937
Contract Drilling [Member]
Revenues:
Total revenues	$ 30,811	$ 98,033	$ 188,637	$ 153,364	$ 406,503
Operating expenses:
Contract drilling, excluding depreciation	40,053	90,711	165,943	181,626	350,455
Reimbursable Expenses [Member]
Revenues:
Total revenues	3,751	16,878	9,566	16,015	20,870
Operating expenses:
Contract drilling, excluding depreciation	$ 3,640	$ 16,572	$ 8,307	$ 15,477	$ 19,419