Summary of Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) customer	Dec. 31, 2019 USD ($) customer	Dec. 31, 2018 USD ($) customer	Feb. 17, 2021 $ / shares	Jan. 01, 2019 USD ($)
Significant Accounting Policies [Line Items]
Payment terms on sales		45 days
Gross sales		$ 936.9	$ 1,038.1	$ 975.3
Right-of-use assets and lease liabilities						$ 29.2
Lease renewal term operating and finance lease		5 years
Operating and finance lease existence of option to terminate		true
Short-term leases term		12 months
Impairment charges	$ 0.0
Dividends payable, date declared		Feb. 17, 2021
Dividends payable, date to be paid		Mar. 18, 2021
Dividends payable, date of record		Mar. 04, 2021
Subsequent Event [Member]
Significant Accounting Policies [Line Items]
Dividends declared per common share outstanding | $ / shares					$ 0.21
Minimum [Member] | Customer Relationships [Member]
Significant Accounting Policies [Line Items]
Definite-lived intangible assets, useful life		1 year
Minimum [Member] | Developed Technology [Member]
Significant Accounting Policies [Line Items]
Definite-lived intangible assets, useful life		13 years
Minimum [Member] | Machinery And Equipment [Member]
Significant Accounting Policies [Line Items]
Useful Life		2 years
Minimum [Member] | Computer Equipment [Member]
Significant Accounting Policies [Line Items]
Useful Life		3 years
Minimum [Member] | Office Furniture And Equipment [Member]
Significant Accounting Policies [Line Items]
Useful Life		5 years
Minimum [Member] | Buildings [Member]
Significant Accounting Policies [Line Items]
Useful Life		15 years
Minimum [Member] | Computer Software [Member]
Significant Accounting Policies [Line Items]
Useful Life		3 years
Maximum [Member]
Significant Accounting Policies [Line Items]
Remaining lease term operating and finance lease		17 years
Maximum [Member] | Customer Relationships [Member]
Significant Accounting Policies [Line Items]
Definite-lived intangible assets, useful life		20 years
Maximum [Member] | Developed Technology [Member]
Significant Accounting Policies [Line Items]
Definite-lived intangible assets, useful life		19 years
Maximum [Member] | Machinery And Equipment [Member]
Significant Accounting Policies [Line Items]
Useful Life		15 years
Maximum [Member] | Computer Equipment [Member]
Significant Accounting Policies [Line Items]
Useful Life		5 years
Maximum [Member] | Office Furniture And Equipment [Member]
Significant Accounting Policies [Line Items]
Useful Life		7 years
Maximum [Member] | Buildings [Member]
Significant Accounting Policies [Line Items]
Useful Life		30 years
Maximum [Member] | Computer Software [Member]
Significant Accounting Policies [Line Items]
Useful Life		7 years
Gross Sales [Member] | Concentration Risk On Three Customers [Member]
Significant Accounting Policies [Line Items]
Number of customers accounted for significant percentage of net sales | customer		2	2	3
Gross sales		$ 370.3	$ 428.7	$ 459.3
Gross Sales [Member] | Geographic Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Concentration risk, percentage		10.00%	10.00%	10.00%