Discontinued Operations - Carrying Amounts of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	$ 19.1		$ 18.7
Current assets held for sale	125.1	$ 108.9
Noncurrent assets held for sale	57.1	55.4
Current liabilities held for sale	53.2	48.2
Noncurrent liabilities held for sale	22.5	20.9
Darex | Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents	19.1	17.2
Trade accounts receivable	55.3	50.5
Inventories	39.6	32.3
Other current assets	11.1	8.9
Current assets held for sale	125.1	108.9
Properties and equipment, net	39.5	39.6
Goodwill	4.7	4.4
Technology and other intangible assets, net	0.4	0.4
Deferred income taxes	8.1	6.4
Other assets	4.4	4.6
Noncurrent assets held for sale	57.1	55.4
Accounts payable	31.7	26.7
Other current liabilities	21.5	21.5
Current liabilities held for sale	53.2	48.2
Deferred income taxes	2.4	2.3
Underfunded and unfunded defined benefit pension plans	16.0	14.8
Other liabilities	4.1	3.8
Noncurrent liabilities held for sale	$ 22.5	$ 20.9