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Leases (Tables) | 12 Months Ended
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Dec. 31, 2017
Leases [Abstract] |
Schedule of Rent Expense | Net rental expense for operating leases for the years ended December 31, 2017, 2016 and 2015 was:
DOLLARS IN MILLIONS |  | 2017 |  | 2016 |  | 2015
Minimum Rental Expense |  | $ | 20.5 |  |  | $ | 21.2 |  |  | $ | 20.7 |
Less Sublease Rental Income |  | (1.6 | ) |  | (1.6 | ) |  | (1.7 | )
Net Rental Expense |  | $ | 18.9 |  |  | $ | 19.6 |  |  | $ | 19.0 |
Schedule of Future Minimum Lease Payments for Capital and Operating Leases | Future minimum lease payments under capital and operating leases at December 31, 2017 were:
DOLLARS IN MILLIONS |  | Capital Leases |  | Operating Leases
2018 |  | $ | 0.1 |  |  | $ | 15.3 |
2019 |  | — |  |  | 12.8 |
2020 |  | — |  |  | 10.6 |
2021 |  | — |  |  | 8.7 |
2022 |  | — |  |  | 7.1 |
2023 and Thereafter |  | — |  |  | 9.0 |
Total Future Payments |  | $ | 0.1 |  |  | $ | 63.5 |
Less Imputed Interest |  | — |  |  |
Present Value of Minimum Capital Lease Payments |  | $ | 0.1 |  |  |

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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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