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Other Income, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016 | May 23, 2012
Other Income and Expenses [Abstract] |  |  |  |  |
Interest income | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.1 |
Realized gain on investments | 0.7 | 0.3 | 1.4 | 0.3 |
Loss on extinguishment of debt | 0.0 | (11.1) | 0.0 | (11.1) |
All other income, net | 0.3 | 0.1 | 0.2 | 0.3 |
Other income (expense), net | $ 1.0 | (10.7) | $ 1.6 | $ (10.4) |
Senior Notes | Senior Notes Due 2020 |  |  |  |  |
Debt Instrument |  |  |  |  |
Debt instrument contractual rate (percent) |  |  |  |  | 8.25%
Redemption premium |  | 8.2 |  |  |
Write off of deferred debt issuance cost |  | $ 2.9 |  |  |

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12317-112629 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=49170532&loc=d3e12355-112629 + Details
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