Restructuring and Severance (Tables)

12 Months Ended

Dec. 31, 2023

Restructuring and Related Activities [Abstract]

Summary of activity in the restructuring and severance liability

Liabilities have been established for employee separations. A summary of activity in the restructuring and severance liability is shown below:

	Successor
(dollars in millions)	Employee Separation
Balance as of September 8, 2021	$	0.1
Charges		0.6
Utilizations		(0.5	)
Balance as of December 31, 2021		0.2
Charges		2.0
Utilizations		(2.2	)
Balance as of December 31, 2022		—
Charges		13.8
Utilizations		(3.3	)
Balance as of December 31, 2023	$	10.5
	Predecessor
(dollars in millions)	Employee Separation
Balance as of December 31, 2020	$	4.5
Charges		1.2
Utilizations		(5.6	)
Balance as of September 7, 2021	$	0.1

Summary of Restructuring Activity by Business Segment

A summary of restructuring activity by business segment is presented below:

	Successor
(dollars in millions)	Network			IT Services and Hardware			Corporate			Total
Balance as of September 8, 2021	$	0.1		$	—		$	—		$	0.1
Charges		—			0.6			—			0.6
Utilizations		—			(0.5	)		—			(0.5	)
Balance as of December 31, 2021		0.1			0.1			—			0.2
Charges		—			2.0			—			2.0
Utilizations		(0.1	)		(2.1	)		—			(2.2	)
Balance as of December 31, 2022		—			—			—			—
Charges		10.3			3.0			0.5			13.8
Utilizations		(0.6	)		(2.7	)		—			(3.3	)
Balance as of December 31, 2023	$	9.7		$	0.3		$	0.5		$	10.5
	Predecessor
(dollars in millions)	Network			IT Services and Hardware			Corporate			Total
Balance as of December 31, 2020	$	4.4		$	—		$	0.1		$	4.5
Charges		(0.5	)		1.7			—			1.2
Utilizations		(3.8	)		(1.7	)		(0.1	)		(5.6	)
Balance as of September 7, 2021	$	0.1		$	—		$	—		$	0.1