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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
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Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Mar. 14, 2018	Feb. 21, 2018	Dec. 31, 2017
Goodwill [Line Items]
Goodwill				$ 862.9			$ 808.3
Accumulated goodwill impairment loss				(808.3)			(808.3)
Goodwill, net of accumulated goodwill impairment loss	$ 0.0	$ 0.0		54.6			0.0
Goodwill [Roll Forward]
Goodwill, beginning balance	0.0
Acquisitions	54.6	0.0	$ 0.0
Goodwill, ending balance	54.6	0.0
Ivie and Associates
Goodwill [Line Items]
Goodwill, net of accumulated goodwill impairment loss						$ 28.3
Goodwill [Roll Forward]
Acquisitions	28.3
Rise Interactive
Goodwill [Line Items]
Goodwill, net of accumulated goodwill impairment loss					$ 26.3
Goodwill [Roll Forward]
Acquisitions	26.3
United States Print and Related Services
Goodwill [Line Items]
Goodwill				832.9			778.3
Accumulated goodwill impairment loss				(778.3)			(778.3)
Goodwill, net of accumulated goodwill impairment loss	0.0	0.0		54.6			0.0
Goodwill [Roll Forward]
Goodwill, beginning balance	0.0
Goodwill, ending balance	54.6	0.0
United States Print and Related Services \| Ivie and Associates
Goodwill [Roll Forward]
Acquisitions	28.3
United States Print and Related Services \| Rise Interactive
Goodwill [Roll Forward]
Acquisitions	26.3
International
Goodwill [Line Items]
Goodwill				30.0			30.0
Accumulated goodwill impairment loss				(30.0)			(30.0)
Goodwill, net of accumulated goodwill impairment loss	0.0	0.0		$ 0.0			$ 0.0
Goodwill [Roll Forward]
Goodwill, beginning balance	0.0
Goodwill, ending balance	0.0	$ 0.0
International \| Ivie and Associates
Goodwill [Roll Forward]
Acquisitions	0.0
International \| Rise Interactive
Goodwill [Roll Forward]
Acquisitions	$ 0.0