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Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Operating Leases |  |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:OtherAssets |
Operating lease right-of-use assets | $ 29.6 | $ 31.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Other current liabilities |
Operating lease liabilities, current portion | $ 5.7 | 5.4
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other liabilities |
Operating lease liabilities | $ 25.9 | 27.8
Total operating lease liabilities | $ 31.6 | $ 33.2
Operating leases: |  |
Weighted average remaining lease term (years) | 7 years 2 months 12 days | 7 years 8 months 12 days
Operating leases: |  |
Weighted average discount rate | 4.00% | 4.10%

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- Definition Present value of lessee's discounted obligation for lease payments from 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 (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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