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Leases - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating lease term (up to) | 10 years |  | 10 years |  |
Option to extend the leases (up to) | 5 years |  | 5 years |  |
Rental purchase option asset | $ 23.9 |  | $ 23.9 |  | $ 11.8
Future minimum lease payments for short-term leases | 15.4 |  | 15.4 |  |
Maximum guaranteed residual value | 786.2 |  | 786.2 |  |
Obligations for operating leases not yet commenced | $ 3.1 |  | $ 3.1 |  |
Minimum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease terms of operating leases not yet commenced | 1 year |  | 1 year |  |
Maximum |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Lease terms of operating leases not yet commenced | 7 years |  | 7 years |  |
Related Parties |  |  |  |  |
Lessee, Lease, Description [Line Items] |  |  |  |  |
Operating lease term (up to) | 10 years |  | 10 years |  |
Lease expense | $ 4.5 | $ 4.2 | $ 13.2 | $ 12.3 |

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- Definition Term of lessee's operating lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918673-209980 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121603541&loc=SL77918638-209977 + Details
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