- Derivatives Gain (Loss) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized hedging gains (losses) and other, net of tax		$ (1.6)	$ 2.9	$ 0.7		$ 5.2
Effective portion	[1]	1.7	(0.1)	4.1		(1.9)
Ineffective portion	[1]			0.0		0.0
Total derivative instruments, net of tax		0.1	2.8	4.8	[2]	3.3
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total derivative instruments, net of tax		(1.2)	2.3	3.7		0.0
Energy contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total derivative instruments, net of tax		1.3	0.5	1.1		3.3
Derivatives Designated as Hedging Instruments | Cash Flow Hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized hedging gains (losses) and other, net of tax		(2.2)	3.2	0.7		3.5
Derivatives Designated as Hedging Instruments | Cash Flow Hedging | Foreign exchange contracts | Cost of sales and services
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion	[1]	1.0	(0.9)	3.0		(3.5)
Ineffective portion	[1]			0.0		0.0
Derivatives Designated as Hedging Instruments | Cash Flow Hedging | Energy contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized hedging gains (losses) and other, net of tax		0.6	(0.3)	0.0		1.7
Derivatives Designated as Hedging Instruments | Cash Flow Hedging | Energy contracts | Cost of sales and services
Derivative Instruments, Gain (Loss) [Line Items]
Effective portion	[1]	0.7	0.8	1.1		1.6
Ineffective portion	[1]			0.0		0.0
Derivatives Not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain or (Loss) Recognized in Income on Derivatives	[3]	11.7	4.7	28.3		(179.9)
Derivatives Not Designated as Hedging Instruments | Foreign exchange contracts | Cost of sales and services
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain or (Loss) Recognized in Income on Derivatives	[3]	11.7	(3.3)			(7.8)
Derivatives Not Designated as Hedging Instruments | Foreign exchange contracts | Selling, General and Administrative Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-tax Gain or (Loss) Recognized in Income on Derivatives	[3],[4]	$ 0.0	$ 8.0	$ 0.0		$ (172.1)

[1] See Note 13 for classification of amounts within the condensed consolidated statements of income (loss).

[2] See condensed consolidated statements of comprehensive income (loss).

[3] Amounts in the columns represent the gain or loss on the derivative instrument offset by the gain or loss on the hedged item.

[4] Charges represent a loss on the Cheminova acquisition hedge. See Note 3 within these condensed consolidated financial statements for more information.