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Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Assets |  |  |
Operating lease right-of-use assets | $ 24.9 | $ 27.1 | $ 0.0
Finance lease right-of-use assets | 0.9 |  |
Total lease right-of-use assets | 25.8 |  |
Current Liabilities: |  |  |
Operating leases | 7.8 |  |
Finance leases | 0.2 |  |
Noncurrent Liabilities: |  |  |
Operating leases | 19.4 |  | $ 0.0
Finance leases | 0.4 |  |
Total lease liabilities | $ 27.8 |  |

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- Definition Present value of lessee's discounted obligation for lease payments from operating and finance leases, classified as noncurrent. + References No definition available. + Details
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- Definition Amount of lessee's right to use underlying asset under operating and finance leases. + References No definition available. + Details
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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