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Debt (Tables) | 6 Months Ended
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Jul. 01, 2018
Debt Disclosure [Abstract] |
Carrying Amounts and Estimated Fair Value of Long-Term Debt | Carrying amounts and the related estimated fair values of the Company’s long-term debt financial instruments not measured at fair value on a recurring basis at July 1, 2018 and December 31, 2017 are presented in the following table:
|  | As of July 1, 2018 |  | As of December 31, 2017
$ in millions |  | Principal |  | Carrying Amount |  | Fair Value |  | Principal |  | Carrying Amount |  | Fair Value
Total long-term debt including current portion |  | $ | 300.3 |  |  | $ | 294.1 |  |  | $ | 311.5 |  |  | $ | 300.8 |  |  | $ | 294.3 |  |  | $ | 312.7 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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