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v3.20.2

Leases (Tables) | 6 Months Ended
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Jun. 30, 2020
Leases [Abstract] |
Lease, Cost [Table Text Block] | The components of lease expense during the three and six months ended June 30, 2020 and 2019 were as follows:
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| (Dollars in millions) |  |  |  |  |  |
Operating lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 8.4 |  |  | $ | 11.8 |  |  | $ | 17.0 |  |  | $ | 27.2 |
Short-term lease cost | 11.6 |  |  | 7.4 |  |  | 21.5 |  |  | 15.7 |
Variable lease cost | 1.6 |  |  | 8.5 |  |  | 2.6 |  |  | 14.5 |
Sublease income | — |  |  | (0.4) |  |  | — |  |  | (0.8) |
Total operating lease cost | $ | 21.6 |  |  | $ | 27.3 |  |  | $ | 41.1 |  |  | $ | 56.6 |
Finance lease cost: |  |  |  |  |  |  |
Amortization of right-of-use assets | $ | 1.0 |  |  | $ | 1.9 |  |  | $ | 4.4 |  |  | $ | 8.6 |
Interest on lease liabilities | 0.1 |  |  | 0.4 |  |  | 0.3 |  |  | 0.9 |
Total finance lease cost | $ | 1.1 |  |  | $ | 2.3 |  |  | $ | 4.7 |  |  | $ | 9.5 |
Schedule of Supplemental Balance Sheet Information Related to Leases [Table Text Block] | Supplemental balance sheet information related to leases at June 30, 2020 and December 31, 2019 was as follows:
| June 30, 2020 |  | December 31, 2019
| (Dollars in millions) |  |
Operating leases: |  |  |
Operating lease right-of-use assets | $ | 50.7 |  |  | $ | 82.4 |
Accounts payable and accrued expenses | $ | 24.9 |  |  | $ | 29.6 |
Operating lease liabilities, less current portion | 42.0 |  |  | 52.8 |
Total operating lease liabilities | $ | 66.9 |  |  | $ | 82.4 |
Finance leases: |  |  |
Property, plant, equipment and mine development | $ | 44.2 |  |  | $ | 89.6 |
Accumulated depreciation | (27.6) |  |  | (45.9) |
Property, plant, equipment and mine development, net | $ | 16.6 |  |  | $ | 43.7 |
Current portion of long-term debt | $ | 6.9 |  |  | $ | 14.3 |
Long-term debt, less current portion | 1.0 |  |  | 0.9 |
Total finance lease liabilities | $ | 7.9 |  |  | $ | 15.2 |
Weighted average remaining lease term (years) |  |  |
Operating leases | 3.6 |  |
Finance leases | 17.3 |  |
Weighted average discount rate |  |  |
Operating leases | 7.4 | % |  |
Finance leases | 6.2 | % |  |
Schedule of Supplemental Cash Flow Information Related to Leases [Table Text Block] | Supplemental cash flow information related to leases during the three and six months ended June 30, 2020 and 2019 was as follows:
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
| (Dollars in millions) |  |  |  |  |  |
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 |
Schedule of Maturities of Operating and Finance Lease Liabilities [Table Text Block] | Maturities of lease liabilities were as follows:
Period Ending December 31, |  | Operating Leases |  | Finance Leases
|  | (Dollars in millions) |  |
2020 |  | $ | 15.9 |  |  | $ | 0.6 |
2021 |  | 23.6 |  |  | 1.2 |
2022 |  | 14.0 |  |  | 0.9 |
2023 |  | 11.9 |  |  | 0.7 |
2024 |  | 4.8 |  |  | 0.6 |
2025 and thereafter |  | 7.2 |  |  | 8.2 |
Total lease payments |  | 77.4 |  |  | 12.2 |
Less imputed interest |  | (10.5) |  |  | (4.3) |
Total lease liabilities |  | $ | 66.9 |  |  | $ | 7.9 |

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