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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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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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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Face amount or stated value per share of common stock.

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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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No definition available.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Per share or per unit amount of equity securities issued.

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Number of new stock issued during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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Fair Value of Financial Instruments, Assets and Equity Investements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2017	Nov. 21, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Common Shares, Par Value (in USD per share)	$ 0.001		$ 0.001
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	84,500,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 6.43
Senior Notes [Member] \| Level 2 [Member] \| Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Long-term debt	$ 7,028		$ 7,218
Senior Notes [Member] \| Level 2 [Member] \| Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Long-term debt	$ 6,739		$ 7,060
Additional Paid-in Capital [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stock Issued During Period, Shares, New Issues	84,500,000	115,000,000