Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year		$ 2.5
Balance at end of year		3.6	$ 2.5
Allowance for Doubtful Accounts and Returns
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year		2.5	2.4	$ 2.5
Charged to costs and expenses		2.5	0.4	1.2
Reclassification	[1]	0.5	0.8	(0.5)
Charged to other accounts	[2]		(0.2)	0.1
Deductions	[3]	(1.9)	(0.9)	(0.9)
Balance at end of year		3.6	2.5	2.4
Sales Returns and Allowances
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year		1.3	0.8	0.5
Charged to costs and expenses		0.1	0.7	0.4
Deductions	[3]	(0.2)	(0.2)	(0.1)
Balance at end of year		1.2	1.3	0.8
Inventory Reserves
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year		5.6	4.1	3.6
Charged to costs and expenses		4.6	1.9	1.7
Charged to other accounts	[2]		(0.1)	0.2
Deductions	[4]	(0.4)	(0.3)	(1.4)
Balance at end of year		9.8	5.6	4.1
Valuation Allowance for Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure
Balance at beginning of year		11.5	9.7	6.9
Charged to costs and expenses		(5.2)	2.4	1.6
Charged to other accounts	[2]	(0.1)	(0.6)	1.2
Balance at end of year		$ 6.2	$ 11.5	$ 9.7

[1] Includes amount reclassified between Allowance for Doubtful Accounts and Other Receivables related to a customer's open receivables balance for proper classification and acquisition-related adjustments.

[2] Primarily includes impact from foreign currency fluctuations

[3] Includes accounts determined to be uncollectible and charged against reserves, net of collections on accounts previously charged against reserves.

[4] Includes inventory identified as excess, slow moving or obsolete and charged against reserves.