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Other Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Schedule of Other Assets | Other assets consisted of the following ($ in millions):
| December 31,
| 2020 |  | 2019
Capitalized software costs, net of accumulated amortization | $ | 12.9 |  |  | $ | 11.9 |
Grantor trust assets | 18.0 |  |  | 14.7 |
Net pension assets | 9.3 |  |  | 5.9 |
Long-term supplies inventory | 6.6 |  |  | 6.9 |
Operating lease assets | 19.8 |  |  | 20.9 |
Other assets | 2.6 |  |  | 8.9 |
Total | $ | 69.2 |  |  | $ | 69.2 |

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- Definition Tabular disclosure of noncurrent assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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