Segment Information (Details)	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 13, 2019 USD ($)	Dec. 31, 2021 USD ($) unit	Dec. 31, 2020 USD ($) unit
Segment Reporting [Abstract]
Number of Reportable Segments | unit			3	2
Segment Reporting Information [Line Items]
Revenues	$ 261,000,000	$ 4,954,000,000	$ 3,645,000,000	$ 3,685,000,000
Segment Adjusted EBITDA:	(15,000,000)	3,819,000,000	(343,000,000)	(1,814,000,000)
Depreciation and Amortization	34,000,000	447,000,000	440,000,000	503,000,000
Share-based Compensation Expense excluding Fresh Start Acceleration Expense		24,000,000
Share-based Compensation Expense	0	(46,000,000)	(25,000,000)	0
Other Adjustments	0	(1,267,000,000)	10,000,000	(1,442,000,000)
Operating Income (Loss), Total	1,000,000	(1,182,000,000)	116,000,000	(1,486,000,000)
Gain on Sale of Operational Assets		15,000,000		12,000,000
Total Capital Expenditures	20,000,000	250,000,000	85,000,000	154,000,000
Assets			4,774,000,000	5,434,000,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Revenues	243,000,000	4,663,000,000	3,546,000,000	3,564,000,000
Segment Adjusted EBITDA:	36,000,000	660,000,000	633,000,000	559,000,000
Assets			2,443,000,000	2,818,000,000
Operating Segments [Member] | Drilling and Evaluation
Segment Reporting Information [Line Items]
Revenues	67,000,000	1,407,000,000	1,066,000,000	1,044,000,000
Segment Adjusted EBITDA:	(3,000,000)	219,000,000	186,000,000	132,000,000
Depreciation and Amortization	11,000,000	168,000,000	164,000,000	183,000,000
Total Capital Expenditures	10,000,000	88,000,000	18,000,000	27,000,000
Assets			783,000,000	950,000,000
Operating Segments [Member] | Well Construction and Completions
Segment Reporting Information [Line Items]
Revenues	90,000,000	1,583,000,000	1,353,000,000	1,414,000,000
Segment Adjusted EBITDA:	19,000,000	225,000,000	256,000,000	273,000,000
Depreciation and Amortization	9,000,000	115,000,000	123,000,000	151,000,000
Total Capital Expenditures	6,000,000	59,000,000	18,000,000	23,000,000
Assets			974,000,000	1,100,000,000
Operating Segments [Member] | Production and Intervention
Segment Reporting Information [Line Items]
Revenues	86,000,000	1,673,000,000	1,127,000,000	1,106,000,000
Segment Adjusted EBITDA:	20,000,000	216,000,000	191,000,000	154,000,000
Depreciation and Amortization	9,000,000	121,000,000	102,000,000	112,000,000
Total Capital Expenditures	2,000,000	60,000,000	36,000,000	73,000,000
Assets			686,000,000	768,000,000
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	18,000,000	291,000,000	99,000,000	121,000,000
Segment Adjusted EBITDA:	(1,000,000)	(104,000,000)	(62,000,000)	(100,000,000)
Depreciation and Amortization	5,000,000	43,000,000	51,000,000	57,000,000
Total Capital Expenditures	$ 2,000,000	$ 43,000,000	13,000,000	31,000,000
Assets			$ 2,331,000,000	$ 2,616,000,000