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Leases - Schedule of Lease Cost Components (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($)
Finance Lease Cost: |  |  |
Amortization of right of use asset |  | $ 1.7 |
Interest on lease liabilities |  | 0.5 |
Operating lease cost |  | 20.5 |
Short-term lease cost |  | 3.1 |
Variable lease cost |  | 0.8 |
Sublease income |  | 0.0 |
Total lease cost |  | 26.6 |
Cash paid for amounts included in the measurement of lease liabilities |  |  |
Operating cash flows from finance leases |  | 0.5 |
Operating cash flows from operating leases |  | 20.8 |
Financing cash flows from finance leases |  | 2.4 |
Right of use assets obtained in exchange for new finance lease liabilities |  | 14.1 |
Right of use assets obtained in exchange for new operating lease liabilities |  | $ 35.9 | [1]
Weighted average remaining lease term - finance leases | 4 years | 4 years |
Weighted average remaining lease term - operating leases | 6 years | 6 years |
Weighted average discount rate - finance leases | 5.30% | 5.30% |
Weighted average discount rate - operating leases | 7.00% | 7.00% |
Operating lease liability, lease renewal reasonably certain | $ 77.7 | $ 77.7 |
Renewal Option Determined As Reasonably Certain |  |  |
Cash paid for amounts included in the measurement of lease liabilities |  |  |
Right of use assets obtained in exchange for new operating lease liabilities | 10.2 |  |
Operating lease liability, lease renewal reasonably certain | $ 10.2 | $ 10.2 |
[1] | (a) Several of the Company’s real property lease contracts include options to extend the lease term. During the fourth quarter of 2019, the Company reassessed the likelihood of renewal and has included $10.2 million for the renewal options for several of these operating leases in the ROU asset and lease liability because the likelihood of renewal was determined to be reasonably certain.

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 5 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918643-209977 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(1) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918638-209977 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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