Description of Business and Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash

A reconciliation of cash, cash equivalents and restricted cash to the Consolidated Balance Sheets follows:

(dollars in millions)	December 31, 2023		December 31, 2022		December 31, 2021
Cash and cash equivalents	$	9.1	$	9.4	$	5.6
Restricted cash included in Other noncurrent assets		3.4		3.5		0.5
Cash, cash equivalents and restricted cash per Consolidated Statements of Cash Flows	$	12.5	$	12.9	$	6.1