CONDENSED CONSOLIDATION DEBTOR-IN-POSSESSION FINANCIAL INFORMATION - Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 312.5		$ 102.4
Trade receivables, allowance for doubtful accounts	7.5		9.0
Trade receivables (net of allowance for doubtful accounts of $0.7 and $2.3, respectively)	285.3		383.8
Inventories, net	459.7		417.4
Prepaid expenses and other assets	132.7		136.0
Total current assets	1,190.2		1,039.6
Property, plant and equipment, accumulated depreciation	552.0		551.3
Property, plant and equipment (net of accumulated depreciation of $431.7 and $426.0, respectively)	267.0		297.3
Deferred income taxes	42.8		42.8
Goodwill	561.9		562.8
Intangible assets, accumulated amortization and impairment	364.3		326.4
Intangible assets (net of accumulated amortization and impairment of $309.7 and $274.4, respectively)	346.7		392.2
Other assets	95.1		97.8
Total assets	2,503.7		2,432.5
Current liabilities:
Short-term borrowings	2.3		0.7
Current portion of long-term debt	593.0		137.2
Accounts payable	80.6		217.7
Accrued expenses and other current liabilities	293.9		432.0
Total current liabilities	969.8		787.6
Long-term debt	0.0		3,305.5
Long-term pension and other post-retirement plan liabilities	140.9		147.3
Other long-term liabilities	73.9		206.2
Liabilities subject to compromise	3,667.3		0.0
Stockholder’s (deficiency) equity	(2,348.2)	$ (2,078.6)	(2,014.1)	$ (2,020.0)	$ (1,958.7)	$ (1,862.0)
Total liabilities and stockholder’s (deficiency) equity	2,503.7		2,432.5
Debtors
Current assets:
Cash and cash equivalents	241.6		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)	151.7		258.7
Trade receivables from non-debtor subsidiaries	410.3		400.4
Inventories, net	282.3		261.8
Prepaid expenses and other assets	89.5		74.5
Total current assets	1,175.4		1,013.3
Property, plant and equipment, accumulated depreciation	431.7		426.0
Property, plant and equipment (net of accumulated depreciation of $431.7 and $426.0, respectively)	197.6		219.4
Deferred income taxes	2.9		17.5
Goodwill	540.0		540.0
Intangible assets, accumulated amortization and impairment	309.7		274.4
Intangible assets (net of accumulated amortization and impairment of $309.7 and $274.4, respectively)	285.9		320.8
Investment in subsidiaries	877.7		874.5
Due from affiliates	261.5		249.8
Other assets	75.0		74.8
Total assets	3,416.0		3,310.1
Current liabilities:
Short-term borrowings	0.0		0.0
Current portion of long-term debt	592.8		137.1
Accounts payable	2.3		134.7
Accounts payable to non-debtors	78.8		234.5
Accrued expenses and other current liabilities	135.8		267.1
Total current liabilities	809.7		773.4
Long-term debt	0.0		3,234.2
Long-term pension and other post-retirement plan liabilities	135.3		141.3
Other long-term liabilities	199.9		337.9
Liabilities subject to compromise	3,874.9		0.0
Total liabilities	5,019.8		4,486.8
Stockholder’s (deficiency) equity	(1,603.8)		(1,176.7)
Total liabilities and stockholder’s (deficiency) equity	$ 3,416.0		$ 3,310.1