Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

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Amount of increase (decrease) in the accrual for restructuring costs.

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Restructuring (Restructuring Liability) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Reserve [Roll Forward]
Utilization	$ 1.1	$ 0.0	$ 14.3	$ (22.0)
2020 Repositioning Actions
Restructuring Reserve [Roll Forward]
Utilization	1.1	$ 0.0	1.5	(24.2)
2019 Repositioning Actions
Restructuring Reserve [Roll Forward]
Utilization			(0.1)	0.0
2017 Repositioning Actions
Restructuring Reserve [Roll Forward]
Utilization			12.9	$ 2.5
Severance
Restructuring Reserve [Roll Forward]
Beginning balance			24.9
Expense (Gain)			0.1
Adjustments			(0.9)
Utilization			(9.4)
Ending balance	14.7		14.7
Severance \| 2020 Repositioning Actions
Restructuring Reserve [Roll Forward]
Beginning balance			4.2
Expense (Gain)			0.0
Adjustments			(0.7)
Utilization			(3.0)
Ending balance	0.5		0.5
Severance \| 2019 Repositioning Actions
Restructuring Reserve [Roll Forward]
Beginning balance			16.0
Expense (Gain)			0.1
Adjustments			0.0
Utilization			(6.1)
Ending balance	10.0		10.0
Severance \| 2017 Repositioning Actions
Restructuring Reserve [Roll Forward]
Beginning balance			4.7
Expense (Gain)			0.0
Adjustments			(0.2)
Utilization			(0.3)
Ending balance	$ 4.2		$ 4.2