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Leases - ROU Asset and Lease Liability (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Assets |  |
Operating lease ROU assets | $ 150.4 | $ 164.7
Liabilities |  |
Operating lease current liabilities | 26.3 | 31.5
Operating lease noncurrent liabilities | $ 152.7 | $ 163.2
Operating Lease, Right-of-Use Asset, Statement of Financial Position | us-gaap:OtherAssetsNoncurrent |
Operating Lease, Liability, Current, Statement of Financial Position | us-gaap:AccruedLiabilitiesCurrent |
Operating Lease, Liability, Noncurrent, Statement of Financial Position | us-gaap:OtherLiabilitiesNoncurrent |

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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=121603541&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=121603541&loc=SL77918627-209977 + Details
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