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Summary of Provisions (Details) - Successor - Effect of Plan | Apr. 01, 2017 USD ($) shares
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Fresh-Start Adjustment [Line Items] |
Stock and warrants issued, value | $ 750,000,000
Warrants issued (in shares) | 6,200,000
First Lien Senior Secured Notes | Senior Notes |
Fresh-Start Adjustment [Line Items] |
Principal amount | 1,000,000,000.0
First LIen Credit Facility | Line of Credit |
Fresh-Start Adjustment [Line Items] |
Principal amount | 950,000,000.0
Series A Preferred Stock |
Fresh-Start Adjustment [Line Items] |
Preferred stock | $ 750,000,000
Preferred Stock, shares issued (in shares) | shares | 30,000,000.0
Common Stock |
Fresh-Start Adjustment [Line Items] |
Stock issued (in shares) | $ 70,900,000

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