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Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |
Operating cash flows for operating leases | $ 6.8 | $ 9.3 | $ 19.6 | $ 33.3
Operating cash flows for finance leases | 0.1 | 0.4 | 0.3 | 1.2
Financing cash flows for finance leases | 2.1 | 8.2 | 7.9 | 18.4
Right-of-use assets obtained in exchange for lease obligations: |  |  |  |
Operating leases | 0.8 | 5.8 | 2.1 | 6.3
Finance leases | $ 0.8 | $ 0.1 | $ 0.9 | $ 0.1

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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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