CONDENSED CONSOLIDATION DEBTOR-IN-POSSESSION FINANCIAL INFORMATION - Consolidated Balance Sheets (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 249.3	$ 102.4
Trade receivables, allowance for doubtful accounts		6.3	9.0
Trade receivables (net of allowance for doubtful accounts of $0.9 and $2.3, respectively)		352.7	383.8
Inventories, net		469.3	417.4
Prepaid expenses and other assets (a)	[1]	140.2	136.0
Total current assets		1,211.5	1,039.6
Property, plant and equipment, accumulated depreciation		562.3	551.3
Property, plant and equipment (net of accumulated depreciation of $439.6 and $426.0, respectively)		251.6	297.3
Deferred income taxes		33.9	42.8
Goodwill		562.2	562.8	$ 563.7
Intangible assets, accumulated amortization and impairment		378.1	326.4
Intangible assets (net of accumulated amortization and impairment of $232.5 and $274.4, respectively)		334.1	392.2
Other assets		96.5	97.8
Total assets		2,489.8	2,432.5
Current liabilities:
Short-term borrowings		0.2	0.7
Current portion of long-term debt		746.9	137.2
Accounts payable		125.9	217.7
Accrued expenses and other current liabilities		387.0	432.0
Total current liabilities		1,260.0	787.6
Long-term debt		0.1	3,305.5
Long-term pension and other post-retirement plan liabilities		84.5	147.3
Other long-term liabilities		96.7	206.2
Liabilities subject to compromise		3,711.2	0.0
Stockholder’s (deficiency) equity		(2,662.7)	(2,014.1)	$ (1,862.0)
Total liabilities and stockholder’s (deficiency) equity		2,489.8	2,432.5
Debtors
Current assets:
Cash and cash equivalents		163.7	17.9
Trade receivables, allowance for doubtful accounts		0.9	2.3
Trade receivables (net of allowance for doubtful accounts of $0.9 and $2.3, respectively)		220.6	258.7
Trade receivables from non-debtor subsidiaries		493.1	400.4
Inventories, net		302.4	261.8
Prepaid expenses and other assets (a)		93.2	74.5
Total current assets		1,273.0	1,013.3
Property, plant and equipment, accumulated depreciation		439.6	426.0
Property, plant and equipment (net of accumulated depreciation of $439.6 and $426.0, respectively)		178.4	219.4
Deferred income taxes		4.7	17.5
Goodwill		540.0	540.0
Intangible assets, accumulated amortization and impairment		232.5	274.4
Intangible assets (net of accumulated amortization and impairment of $232.5 and $274.4, respectively)		272.6	320.8
Investment in subsidiaries		877.7	874.5
Due from affiliates		269.1	249.8
Other assets		76.0	74.8
Total assets		3,491.5	3,310.1
Current liabilities:
Short-term borrowings		0.0	0.0
Current portion of long-term debt		746.8	137.1
Accounts payable		52.3	134.7
Accounts payable to non-debtors		27.3	234.5
Accrued expenses and other current liabilities		242.3	267.1
Total current liabilities		1,068.7	773.4
Long-term debt		0.0	3,234.2
Long-term pension and other post-retirement plan liabilities		81.0	141.3
Other long-term liabilities		20.5	337.9
Liabilities subject to compromise		4,209.5	0.0
Total liabilities		5,379.7	4,486.8
Stockholder’s (deficiency) equity		(1,888.2)	(1,176.7)
Total liabilities and stockholder’s (deficiency) equity		$ 3,491.5	$ 3,310.1

[1] Includes restricted cash of $3.8 million and $18.5 million for December 31, 2022 and 2021, respectively.