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Commitments and Contingent Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Future Minimum Lease Payments and Rental Commitments | The aggregate future minimum lease payments for capital leases, operating leases, and rental commitments as of December 31, 2018 are as follows:
(in millions) | Capital Leases |  | Operating Leases
2019 | $ | 2.3 |  |  | $ | 9.7 |
2020 | 2.3 |  |  | 9.3 |
2021 | 2.3 |  |  | 8.8 |
2022 | 2.3 |  |  | 8.1 |
2023 | 2.3 |  |  | 6.1 |
2024 and thereafter | 2.6 |  |  | 3.8 |
Total minimum lease payments | 14.1 |  |  | 45.8 |
Less sublease rental income | — |  |  | (8.8 | )
Net minimum lease payments | 14.1 |  |  | $ | 37.0 |
Less imputed interest | (1.6 | ) |  |
Present value of capital lease obligations | $ | 12.5 |  |  |

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