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Leases (Tables) | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Schedule of Lease Terms and Discount Rates | The following table presents lease terms and discount rates as of December 31, 2020:
|  | Finance Leases |  |  | Operating Leases |
Weighted-average lease term (in years) |  |  | 4.8 |  |  |  | 9.2 |
Weighted-average discount rate |  |  | 3.9 | % |  |  | 5.4 | %
Schedule of Lease Assets and Lease Liabilities | The following table summarizes the classification of lease assets and lease liabilities on our Consolidated Balance Sheets (in millions of dollars):
|  |  |  | As of December 31, |
Leases |  | Classification |  | 2020 |  |  | 2019 |
Assets |  |  |  |  |  |  |  |  |  |
Operating lease assets |  | Operating lease assets |  | $ | 26.5 |  |  | $ | 25.8 |
Finance lease assets |  | Property, plant and equipment, net |  |  | 8.1 |  |  |  | 6.6 |
Total lease assets |  |  |  | $ | 34.6 |  |  | $ | 32.4 |
Liabilities |  |  |  |  |  |  |  |  |  |
Current: |  |  |  |  |  |  |  |  |  |
Operating lease liabilities |  | Other accrued liabilities |  | $ | 4.4 |  |  | $ | 3.9 |
Finance lease liabilities |  | Other accrued liabilities |  |  | 1.9 |  |  |  | 1.2 |
Non-current: |  |  |  |  |  |  |  |  |  |
Operating lease liabilities |  | Long-term portion of operating lease liabilities |  |  | 25.6 |  |  |  | 25.2 |
Finance lease liabilities |  | Long-term liabilities |  |  | 6.2 |  |  |  | 5.4 |
Total lease liabilities |  |  |  | $ | 38.1 |  |  | $ | 35.7 |
Components of Lease Cost | The following table summarizes the components of lease cost on our Statements of Consolidated Income (in millions of dollars):
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |
Operating lease cost |  | $ | 6.8 |  |  | $ | 7.5 |
Short-term lease cost |  |  | 1.6 |  |  |  | 1.2 |
Finance lease cost: |  |  |  |  |  |  |  |
Amortization of leased assets |  |  | 1.6 |  |  |  | 1.5 |
Interest on lease liabilities |  |  | 0.3 |  |  |  | 0.3 |
Total lease cost |  | $ | 10.3 |  |  | $ | 10.5 |
Schedule of Maturity of Our Lease Liabilities | The following table presents the maturity of our lease liabilities as of December 31, 2020 (in millions of dollars):
Maturity of Lease Liabilities |  | Finance Leases |  |  | Operating Leases |
2021 |  | $ | 2.2 |  |  | $ | 5.9 |
2022 |  |  | 2.0 |  |  |  | 5.0 |
2023 |  |  | 1.7 |  |  |  | 4.6 |
2024 |  |  | 1.2 |  |  |  | 4.2 |
2025 |  |  | 1.0 |  |  |  | 2.3 |
Thereafter |  |  | 0.8 |  |  |  | 16.9 |
Total minimum lease payments |  | $ | 8.9 |  |  | $ | 38.9 |
Less: interest |  |  | (0.8 | ) |  |  | (8.9 | )
Present value |  | $ | 8.1 |  |  | $ | 30.0 |

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