Discontinued Operations (Major Classes) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Current assets held for sale		$ 17.4
Long-term assets held for sale	$ 0.0	199.9
Assets held for sale	220.5	217.3
Current liabilities:
Current liabilities held for sale		27.4
Long-term liabilities held for sale	0.0	26.2
Discontinued Operations, Held-for-sale | Engineered Materials
Current assets:
Accounts receivable, net	10.6	8.8
Inventories, net	8.2	8.5
Other current assets	0.6	0.1
Current assets held for sale	19.4	17.4
Property, plant and equipment, net	28.3	26.8
Other assets	0.3	0.6
Intangible assets, net	1.2	1.2
Goodwill	171.3	171.3
Long-term assets held for sale	201.1	199.9
Assets held for sale	220.5	217.3
Current liabilities:
Accounts payable	27.0	19.5
Accrued liabilities	12.0	7.9
Current liabilities held for sale	39.0	27.4
Long-term deferred tax liability	5.8	26.1
Other liabilities	0.1	0.1
Long-term liabilities held for sale	5.9	26.2
Liabilities held for sale	$ 44.9	$ 53.6