Discontinued Operations - Carrying Value of Major Classes of Assets and Liabilities of Discontinued Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Assets
Current assets of discontinued operations	$ 11.2	$ 1,621.3
Non-current assets of discontinued operations	6.5	3,412.4
Liabilities
Current liabilities of discontinued operations	34.1	826.8
Deferred income taxes		450.0
Non-current liabilities of discontinued operations	0.0	416.2
Disposed of by Sale | Agricultural Solutions Business
Assets
Cash and cash equivalents	0.0	177.8
Accounts receivable, net	0.0	919.4
Inventories	0.0	369.1
Other current assets	11.2	155.0
Current assets of discontinued operations	11.2	1,621.3
Property, plant and equipment, net	0.0	172.0
Goodwill	0.0	1,816.9
Intangible assets, net	0.0	1,797.7
Other assets	6.5	(374.2)
Non-current assets of discontinued operations	6.5	3,412.4
Liabilities
Accounts payable	0.0	365.7
Current installments of revolving credit facilities	0.0	52.5
Accrued expenses and other current liabilities	34.1	408.6
Current liabilities of discontinued operations	34.1	826.8
Deferred income taxes	0.0	369.9
Other liabilities	0.0	46.3
Non-current liabilities of discontinued operations	0.0	416.2
Estimated impairment loss	$ (2.4)	$ 450.0	$ 0.0