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Leases (Tables) | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Schedule of Supplemental Balance Sheet Information Related to Operating Leases | Supplemental balance sheet information related to our operating leases was as follows (dollars in millions):
| Year Ended December 31, |
| 2020 |  |  | 2019 |
Operating lease right-of-use assets | $ | 234.2 |  |  | $ | 234.3 |
Current portion of operating lease obligations | $ | 68.9 |  |  | $ | 62.6 |
Long-term portion of operating lease obligations |  | 173.6 |  |  |  | 177.6 |
Total operating lease obligations | $ | 242.5 |  |  | $ | 240.2 |
Schedule of Supplemental Balance Sheet Information Related to Finance Leases | Supplemental balance sheet information related to our finance leases was as follows (dollars in millions):
| Year Ended December 31, |
| 2020 |  |  | 2019 |
Buildings | $ | 0.3 |  |  | $ | 0.3 |
Machinery and equipment |  | 28.5 |  |  |  | 28.5 |
Total |  | 28.8 |  |  |  | 28.8 |
Less accumulated amortization |  | (19.6 | ) |  |  | (18.1 | )
Total | $ | 9.2 |  |  | $ | 10.7 |
Current portion of finance lease obligations | $ | 1.6 |  |  | $ | 1.5 |
Long-term portion of finance lease obligations |  | 14.4 |  |  |  | 16.0 |
Total finance lease obligations | $ | 16.0 |  |  | $ | 17.5 |
Schedule of Weighted Average Remaining Lease Term and Weighted Average Discount Rates for Leases | For both operating and finance leases, the weighted average remaining lease term in years and weighted average discount rates were as follows:
| Year Ended December 31, |
| 2020 |  |  | 2019 |
Weighted-average remaining lease term (years): |  |  |  |  |  |  |
Operating leases |  | 5.3 |  |  |  | 5.6 |
Finance leases |  | 7.8 |  |  |  | 8.8 |
Weighted-average discount rate: |  |  |  |  |  |  |
Operating leases | 3.79% |  |  | 4.23% |
Finance leases | 6.66% |  |  | 6.66% |
Components of Lease Expense | The components of lease expense were as follows (dollars in millions):
| Year Ended December 31, |
| 2020 |  |  | 2019 |
Finance lease cost: |  |  |  |  |  |  |
Amortization of finance lease assets | $ | 1.5 |  |  | $ | 1.5 |
Interest on lease liabilities |  | 1.1 |  |  |  | 1.2 |
Total finance lease cost |  | 2.6 |  |  |  | 2.7 |
Operating lease cost |  | 74.4 |  |  |  | 70.2 |
Short-term lease cost |  | 18.0 |  |  |  | 19.2 |
Variable lease cost |  | 12.9 |  |  |  | 13.7 |
Total lease cost | $ | 107.9 |  |  | $ | 105.8 |
Schedule of Supplemental Cash Flow Information Related to Leases | Supplemental cash flow information related to leases was as follows (dollars in millions):
| Year Ended December 31, |
| 2020 |  |  | 2019 |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows for operating leases | $ | (68.2 | ) |  | $ | (60.0 | )
Operating cash flows for finance leases |  | (1.5 | ) |  |  | (1.5 | )
Financing cash flows for finance leases |  | (1.1 | ) |  |  | (1.2 | )
Right-of-use assets obtained in exchange for new lease obligations: |  |  |  |  |  |  |
Operating leases | $ | (35.7 | ) |  | $ | (27.7 | )
Finance leases |  | — |  |  |  | — |
Supplemental non-cash information on changes in lease liabilities | $ | 34.8 |  |  | $ | 44.5 |
Supplemental non-cash information on changes in right-of-use assets | $ | 35.8 |  |  | $ | 21.4 |
Schedule of Future Minimum Payments Under Operating and Finance Lease Liabilities | The future minimum payments under operating and finance lease liabilities at December 31, 2020 were as follows (dollars in millions):
|  | Operating Leases |  |  | Finance Leases |
2021 |  | $ | 76.7 |  |  | $ | 2.7 |
2022 |  |  | 58.9 |  |  |  | 2.7 |
2023 |  |  | 42.3 |  |  |  | 2.7 |
2024 |  |  | 30.3 |  |  |  | 2.7 |
2025 |  |  | 21.1 |  |  |  | 2.7 |
Thereafter |  |  | 40.4 |  |  |  | 7.0 |
Total lease payments |  |  | 269.7 |  |  |  | 20.5 |
Less imputed interest (a) |  |  | (27.2 | ) |  |  | (4.5 | )
Present value of lease liabilities |  | $ | 242.5 |  |  | $ | 16.0 |
| (a) | Calculated using the incremental borrowing rate for each lease applied to the future payments.

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