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Fair Value (Details) $ in Millions | Dec. 31, 2015 USD ($)
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Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | $ 3.1
Convertible Notes [Member] |
Fair value debt instruments [Line Items] |
Fair value of debt instrument | 4.0
Fair Value, Inputs, Level 2 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 3.1
Fair Value, Inputs, Level 2 [Member] | Senior notes due 2017 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 400.0
Long-term Debt, Fair Value | 398.0
Fair Value, Inputs, Level 2 [Member] | Senior notes due 2018 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 800.0
Long-term Debt, Fair Value | 795.0
Fair Value, Inputs, Level 2 [Member] | Senior notes due 2019 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 500.0
Long-term Debt, Fair Value | 553.0
Fair Value, Inputs, Level 2 [Member] | Senior Notes 2020 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 600.0
Long-term Debt, Fair Value | 599.0
Fair Value, Inputs, Level 2 [Member] | Senior notes due 2022 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 500.0
Long-term Debt, Fair Value | 488.0
Fair Value, Inputs, Level 2 [Member] | Senior Notes 2025 [Member] |
Fair value debt instruments [Line Items] |
Face Value of Debt Instrument | 300.0
Long-term Debt, Fair Value | $ 304.0

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611 + 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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- Definition 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. + References No definition available. + Details
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