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Leases - Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Operating Leases |  |
Operating lease right-of-use assets | $ 33.8 | $ 0.0
Current portion of operating lease liabilities | 11.0 | 0.0
Operating lease liabilities, net of current portion | 22.8 | 0.0
Total operating lease liabilities | 33.8 |
Finance leases |  |
Net property, plant and equipment, net | 195.0 | $ 196.4
Total finance lease liabilities | $ 1.8 |
Weighted average remaining lease term |  |
Operating leases | 3 years 4 months 24 days |
Finance leases | 1 year 9 months 18 days |
Weighted average discount rate |  |
Operating leases | 3.10% |
Finance leases | 2.40% |
Financial Leases [Member] |  |
Finance leases |  |
Property, plant and equipment at cost | $ 10.5 |
Accumulated depreciation | (8.3) |
Net property, plant and equipment, net | 2.2 |
Current portion of finance leases | 1.2 |
Finance leases, net of current portion | 0.6 |
Total finance lease liabilities | $ 1.8 |

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