Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments, Fair Value of Other Financial Instruments (Details)

v3.10.0.1
Financial Instruments, Fair Value of Other Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Jul. 01, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]      
Fair Value of the Company's Long-Term Debt Including Current Maturities $ 491.4 $ 492.1 $ 499.3
Long-Term Debt $ 438.8 $ 439.1 $ 443.1