Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Company's Financial Instruments

Carrying amounts and the related estimated fair values of our financial instruments as of September 30, 2021 and December 31, 2020 are as follows:

	September 30, 2021				December 31, 2020
	Fair Value		Carrying Value		Fair Value		Carrying Value
(Dollars in millions)
Financial assets:
Investments and other assets	$	1.2	$	1.2	$	1.2	$	1.2
Financial liabilities:
Long-term debt (including current portion)	$	828.5	$	813.5	$	799.2	$	784.2