Discontinued Operations - Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of income taxes	$ 26.6	$ 20.2	$ (142.2)	$ 42.9
Adjustment for workers’ compensation, product liability, and other postretirement benefits	(1.7)	(0.5)	(0.4)	0.2
Provision for environmental liabilities	3.5	1.2	4.5	2.5
Provision for legal reserves and expenses	2.3	2.4	4.2	4.1
Adjustment for workers’ compensation, product liability, other postretirement benefits and other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of income taxes	2.1	0.3	1.7	(0.1)
Provision for environmental liabilities, net of recoveries
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of income taxes	(7.9)	(1.9)	(10.7)	(4.8)
Provision for legal reserves and expenses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of income taxes	(4.3)	(4.2)	(7.8)	(7.0)
FMC Health and Nutrition
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of income taxes	36.7	26.0	(125.4)	54.8
Income tax benefit (expense)	$ (12.5)	$ (11.5)	$ (17.6)	$ (22.0)