CONDENSED CONSOLIDATION DEBTOR-IN-POSSESSION FINANCIAL INFORMATION - Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 246.4			$ 102.4
Trade receivables, allowance for doubtful accounts	6.9			9.0
Trade receivables (net of allowance for doubtful accounts of $0.7 and $2.3, respectively)	319.0			383.8
Inventories, net	456.0			417.4
Prepaid expenses and other assets	217.2			136.0
Total current assets	1,238.6			1,039.6
Property, plant and equipment, accumulated depreciation	549.2			551.3
Property, plant and equipment (net of accumulated depreciation of $433.2 and $426.0, respectively)	249.9			297.3
Deferred income taxes	41.2			42.8
Goodwill	561.2			562.8
Intangible assets, accumulated amortization and impairment	368.4			326.4
Intangible assets (net of accumulated amortization and impairment of $226.3 and $274.4, respectively)	335.4			392.2
Other assets	94.3			97.8
Total assets	2,520.6			2,432.5
Current liabilities:
Short-term borrowings	0.6			0.7
Current portion of long-term debt	746.9			137.2
Accounts payable	105.0			217.7
Accrued expenses and other current liabilities	392.1			432.0
Total current liabilities	1,244.6			787.6
Long-term debt	0.1			3,305.5
Long-term pension and other post-retirement plan liabilities	85.4			147.3
Other long-term liabilities	72.5			206.2
Liabilities subject to compromise	3,615.1			0.0
Stockholder’s (deficiency) equity	(2,497.1)	$ (2,348.2)	$ (2,078.6)	(2,014.1)	$ (2,066.3)	$ (2,020.0)	$ (1,958.7)	$ (1,862.0)
Total liabilities and stockholder’s (deficiency) equity	2,520.6			2,432.5
Debtors
Current assets:
Cash and cash equivalents	168.5			17.9
Trade receivables, allowance for doubtful accounts	0.7			2.3
Trade receivables (net of allowance for doubtful accounts of $0.7 and $2.3, respectively)	188.4			258.7
Trade receivables from non-debtor subsidiaries	453.8			400.4
Inventories, net	292.4			261.8
Prepaid expenses and other assets	171.4			74.5
Total current assets	1,274.5			1,013.3
Property, plant and equipment, accumulated depreciation	433.2			426.0
Property, plant and equipment (net of accumulated depreciation of $433.2 and $426.0, respectively)	185.2			219.4
Deferred income taxes	2.7			17.5
Goodwill	540.0			540.0
Intangible assets, accumulated amortization and impairment	226.3			274.4
Intangible assets (net of accumulated amortization and impairment of $226.3 and $274.4, respectively)	278.7			320.8
Investment in subsidiaries	877.7			874.5
Due from affiliates	254.8			249.8
Other assets	75.3			74.8
Total assets	3,488.9			3,310.1
Current liabilities:
Short-term borrowings	0.0			0.0
Current portion of long-term debt	746.8			137.1
Accounts payable	52.6			134.7
Accounts payable to non-debtors	7.9			234.5
Accrued expenses and other current liabilities	231.2			267.1
Total current liabilities	1,038.5			773.4
Long-term debt	0.0			3,234.2
Long-term pension and other post-retirement plan liabilities	79.8			141.3
Other long-term liabilities	7.8			337.9
Liabilities subject to compromise	4,098.4			0.0
Total liabilities	5,224.5			4,486.8
Stockholder’s (deficiency) equity	(1,735.6)			(1,176.7)
Total liabilities and stockholder’s (deficiency) equity	$ 3,488.9			$ 3,310.1