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Debt - Summary (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Debt |  |
Total | $ 2,214.2 | $ 1,914.5
Less: unamortized discount and debt issuance costs | (10.5) | (13.1)
Less: amounts due within one year and short-term borrowings | (65.2) | (92.0)
Total long-term debt | 2,138.5 | 1,809.4
Unsecured revolving credit facility due September 30, 2021 |  |
Debt |  |
Total | 925.0 | 538.0
Unsecured term loan due from March 29, 2019 to September 30, 2021 |  |
Debt |  |
Total | 525.0 | 562.5
Senior unsecured notes due April 15, 2023 |  |
Debt |  |
Total | 500.0 | 500.0
Senior unsecured notes due November 15, 2036 |  |
Debt |  |
Total | 250.0 | 250.0
Other notes and revolving credit facilities |  |
Debt |  |
Total | $ 14.2 | $ 64.0

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- Definition Amount of unamortized debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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