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Leases - Narrative (Details) - USD ($) $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018 | Dec. 30, 2018
Lessee, Lease, Description [Line Items] |  |  |
Operating lease right-of-use assets | $ 66.9 |  | $ 0.0
Operating lease current liabilities | 20.3 |  | 0.0
Operating lease noncurrent liabilities | $ 49.3 |  | $ 0.0
Accounting Standards Update 2016-02 |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Operating lease right-of-use assets |  | $ 74.1 |
Operating lease current liabilities |  | 19.8 |
Operating lease noncurrent liabilities |  | $ 54.3 |
Minimum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Leases, remaining lease term (years) | 1 year |  |
Maximum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Leases, remaining lease term (years) | 10 years |  |

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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 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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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. + 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 Amount of lessee's right to use underlying asset under operating lease. + 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 (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977 + Details
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