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Segment Information (Assets by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net pension income	$ (12.4)	$ (9.6)	$ (5.1)
Assets	2,469.1	2,452.4	2,570.1
United States Print and Related Services
Segment Reporting Information [Line Items]
Assets	2,057.8	2,060.9	2,241.3
International
Segment Reporting Information [Line Items]
Assets	341.5	329.5	312.7
Operating Segments
Segment Reporting Information [Line Items]
Assets	2,399.3	2,390.4	2,554.0
Corporate
Segment Reporting Information [Line Items]
Assets	$ 69.8	$ 62.0	$ 16.1

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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