Description of Business and Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2021

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 Condensed Consolidated Balance Sheets follows:

	Successor		Predecessor
(dollars in millions)	September 30, 2021		December 31, 2020
Cash and cash equivalents	$	5.4	$	12.2
Restricted cash included in Other noncurrent assets		—		5.0
Cash, cash equivalents and restricted cash per Condensed Consolidated Statements of Cash Flows	$	5.4	$	17.2