Leases (Tables)

12 Months Ended

Dec. 31, 2021

Leases [Abstract]

Schedule of Supplemental Balance Sheet Information Related to Leases

Supplemental balance sheet information related to the Company's leases was as follows:

		Successor		Predecessor
		December 31,		December 31,
(dollars in millions)	Balance Sheet Location	2021		2020
Operating lease assets, net of amortization	Operating lease right-of-use assets	$	44.3	$	37.4
Finance lease assets, net of amortization	Property, plant and equipment, net		10.7		28.0
Operating lease liabilities:
Current operating lease liabilities	Other current liabilities		9.6		9.6
Noncurrent operating lease liabilities	Operating lease liabilities		40.2		33.6
Total operating lease liabilities			49.8		43.2
Finance lease liabilities:
Current finance lease liabilities	Current portion of long-term debt		7.2		13.9
Noncurrent finance lease liabilities	Long-term debt, less current portion		42.3		52.1
Total finance lease liabilities		$	49.5	$	66.0

Components of Lease Expense

The components of lease expense were as follows:

	Successor		Predecessor		Predecessor		Predecessor
(dollars in millions)	September 8, 2021 to December 31, 2021		January 1, 2021 to September 7, 2021		Year Ended December 31, 2020		Year Ended December 31, 2019
Operating lease cost	$	4.3	$	8.1	$	13.0	$	13.2
Short-term lease cost		0.1		0.2		0.3		0.3
Variable lease cost		1.1		2.3		2.6		2.1
Finance lease cost:
Depreciation on leased assets		2.0		4.5		7.0		8.3
Interest on lease liabilities		1.2		2.9		4.5		5.1
Total lease cost	$	8.7	$	18.0	$	27.4	$	29.0

Schedule of Supplemental Cash Flow Information Related to Leases

Supplemental cash flow information related to leases was as follows:

	Successor		Predecessor		Predecessor		Predecessor
(dollars in millions)	September 8, 2021 to December 31, 2021		January 1, 2021 to September 7, 2021		Year Ended December 31, 2020		Year Ended December 31, 2019
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	$	1.2	$	2.9	$	4.4	$	5.1
Operating cash flows from operating leases	$	3.4	$	7.2	$	12.1	$	11.0
Financing cash flows from finance leases	$	3.9	$	9.9	$	16.6	$	14.4
Right-of-use assets obtained in exchange for lease obligations:
New operating leases	$	5.4	$	11.5	$	12.6	$	7.5
New finance leases	$	2.0	$	3.8	$	7.7	$	14.5

Schedule of Additional Quantitative Information Related to Leases

Additional quantitative information related to leases was as follows:

	Successor			Predecessor
	December 31,			December 31,
Weighted Average Remaining Lease Term	2021			2020
Operating leases	7.30 years			7.35 years
Finance leases	6.96 years			6.88 years
Weighted Average Discount Rate
Operating leases		5.27	%		5.42	%
Finance leases		6.99	%		7.08	%

Schedule of Future Minimum Lease Payments Under Non-Cancellable Leases

Future minimum lease payments under non-cancellable leases as of December 31, 2021 are as follows:

(dollars in millions)	Operating Leases			Finance Leases
Year ended December 31,
2022	$	12.5		$	10.4
2023		11.1			9.0
2024		9.0			7.9
2025		7.4			6.9
2026		6.3			7.0
Thereafter		22.4			22.7
Total future minimum lease payments		68.7			63.9
Less imputed interest		(12.5	)		(14.4	)
Total	$	56.2		$	49.5

Schedule of Future Minimum Lease Payments to be Received under Non-Cancellable Leases

Future minimum lease payments to be received under non-cancellable leases as of December 31, 2021 are as follows:

(dollars in millions)	Operating Leases
Year ended December 31,
2022	$	2.5
2023		2.1
2024		1.8
2025		1.7
2026		1.7
Thereafter		13.7
Total future minimum lease payments		23.5
Less imputed interest		(7.8	)
Total	$	15.7