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Debt - 2025 Notes (Details) | 12 Months Ended
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Dec. 31, 2018
Senior Notes | 2025 Notes | Prior to January 15, 2020 |
Debt Instrument [Line Items] |
Percentage of par | 100.00%

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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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