Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of cash and cash equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the total amounts shown in the consolidated statements of cash flows for the years ended December 31, 2023, 2022 and 2021:

	Year Ended December 31,
(dollars in millions)	2023		2022		2021
Cash and cash equivalents	$	311.7	$	81.3	$	108.3
Restricted cash	5.5		5.5		4.5
Cash, cash equivalents and restricted cash	$	317.2	$	86.8	$	112.8

Schedule of restrictions on cash and cash equivalents

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets to the total amounts shown in the consolidated statements of cash flows for the years ended December 31, 2023, 2022 and 2021:

	Year Ended December 31,
(dollars in millions)	2023		2022		2021
Cash and cash equivalents	$	311.7	$	81.3	$	108.3
Restricted cash	5.5		5.5		4.5
Cash, cash equivalents and restricted cash	$	317.2	$	86.8	$	112.8