Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

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Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital.

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
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-Subparagraph (SX 210.4-08.(i)(4))
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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No definition available.

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- Definition

The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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- Definition

Per share or per unit amount of equity securities issued.

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- Definition

Number of new stock issued during the period.

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Fresh-Start Adjustment, Issuance Of Successor Common Stock To Creditors

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Shareholders' Equity Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Dec. 13, 2019	Dec. 31, 2019	Dec. 31, 2016	Jun. 30, 2019	Dec. 31, 2018	Nov. 21, 2016	Jun. 07, 2016
Class of Warrant or Right [Line Items]
Additional Paid in Capital		$ 2,897			$ 6,711
Predecessor Capital in Excess of Par Value		$ 0			0
Shares Issued, Price Per Share						$ 5.40
Class of Warrant or Right, Unissued						1
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right		7,777,779		84,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 99.96		$ 6.43
Common Stock
Class of Warrant or Right [Line Items]
Stock Issued During Period, Shares, New Issues	70,000,000	69,999,954
Additional Paid-in Capital [Member]
Class of Warrant or Right [Line Items]
Stock Issued During Period, Shares, New Issues			84,500,000
Exchangeable Debt [Member]
Class of Warrant or Right [Line Items]
Face amount of debt							$ 1,265
Predecessor Capital in Excess of Par Value							$ 97
Warrant [Member]
Class of Warrant or Right [Line Items]
Predecessor Capital in Excess of Par Value	$ 31
Not Designated as Hedging Instrument [Member] \| Warrant [Member] \| Other Noncurrent Liabilities [Member]
Class of Warrant or Right [Line Items]
Derivative Liability, Fair Value, Gross Liability					$ 0
Reorganization Adjustments
Class of Warrant or Right [Line Items]
Fresh-Start Adjustment, Issuance Of Successor Common Stock To Creditors	$ 2,837