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Related Party Transactions - Agreements with Carl Icahn (Details) - Nomination and Standstill Agreement - Icahn Group - shares |  | 6 Months Ended
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Sep. 17, 2014 | Jun. 30, 2017
Related Party Transaction [Line Items] |  |
Ownership percentage limit (more than) | 20.00% |
Net long position shares held, tranche one (at least) (in shares) |  | 1,900,000

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- Definition Related Party Transaction, Ownership Percentage Limitation + References No definition available. + Details
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- Definition Related Party Transactions, Minimum Shares Held, Tranche 1 + References No definition available. + Details
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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. + References No definition available. + Details
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- Details
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- Details
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