Amount of excess of issue price over par or stated value of stock and from other transaction involving stock or stockholder. Includes, but is not limited to, additional paid-in capital (APIC) for common and preferred stock.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 65
-Paragraph 15
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=121322162&loc=SL121327923-165333

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(30)(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Fresh Start Accounting - Narrative (Details) - USD ($)		4 Months Ended	8 Months Ended	9 Months Ended	12 Months Ended
Fresh Start Accounting - Narrative (Details) - USD ($)	Apr. 30, 2021	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Reorganization, Chapter 11 [Line Items]
Enterprise Value	$ 1,860,000,000	$ 1,860,000,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	2.81%	2.81%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.03%	6.03%	6.03%	6.70%		6.48%
Property and equipment, net	$ 909,100,000	$ 909,100,000	$ 890,900,000	$ 15,096,900,000	$ 890,900,000	$ 10,960,500,000
Prepaid Rent, Per Rig	8,000,000	8,000,000
Predecessor, Additional Paid In Capital	0	0
Treasury Stock, Value	0	0	$ 0		$ 0	(76,200,000)
Common shares, shares issued			75,000,000		75,000,000
Additional paid-in capital	$ 1,078,700,000	1,078,700,000	$ 1,083,000,000		$ 1,083,000,000	8,639,900,000
Class Of Warrant, Exercisable	5,600,000
Warrants and Rights Outstanding	$ 16,400,000	16,400,000	$ 16,400,000		$ 16,400,000	$ 0
Reorganization, Chapter 11, Plan Effect Adjustment
Reorganization, Chapter 11 [Line Items]
Property and equipment, net	(417,600,000)	(417,600,000)
Debt Instrument, Face Amount	550,000,000	550,000,000
Debt Issuance Costs, Net	(5,200,000)	(5,200,000)
Common Stock, Value, Issued	(800,000)	(800,000)
Predecessor, Additional Paid In Capital	8,644,000,000	8,644,000,000
Treasury Stock, Value	$ 75,500,000	$ 75,500,000
Common shares, shares issued	75,000,000	75,000,000
Additional paid-in capital	$ 1,078,700,000	$ 1,078,700,000
Warrants and Rights Outstanding	16,400,000	16,400,000
Reorganization, Chapter 11, Plan Effect Adjustment \| Common Class A And B Shares
Reorganization, Chapter 11 [Line Items]
Common Stock, Value, Issued	82,600,000	82,600,000
Reorganization, Chapter 11, Plan Effect Adjustment \| Work in progress
Reorganization, Chapter 11 [Line Items]
Property and equipment, net	(417,600,000)	(417,600,000)
Minimum
Reorganization, Chapter 11 [Line Items]
Enterprise Value	1,860,000,000	1,860,000,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets						6.03%
Maximum
Reorganization, Chapter 11 [Line Items]
Enterprise Value	$ 3,145,000,000	$ 3,145,000,000
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets					6.26%