Fresh Start Accounting - Additional Information (Details) - USD ($) $ in Millions	Mar. 31, 2021	Feb. 09, 2021
Fresh-Start Adjustment [Line Items]
Reorganization value of Successor assets		$ 6,814
Total liabilities		13,175
Total fresh start adjustments impacting reorganizations items, net	$ (201)
Enterprise value		4,851
Minimum
Fresh-Start Adjustment [Line Items]
Fresh-start adjustment, increase (decrease), assets		3,500
Total fresh start adjustments impacting reorganizations items, net		$ 3,500
Maximum
Fresh-Start Adjustment [Line Items]
Percent of voting shares received by holders		50.00%
Fresh-start adjustment, increase (decrease), assets		$ 4,900
Total fresh start adjustments impacting reorganizations items, net		$ 4,900

Enterprise Value

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- Definition

Percent of Voting Shares Received by Holders, Percent

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- Definition

Total fresh-start adjustment to assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Total fresh-start adjustment to liabilities and stockholders' equity.

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-SubTopic 10
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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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Total assets at the balance sheet date after fresh-start adjustments.

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Total liabilities at the balance sheet date before fresh-start adjustments.

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