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Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 894.7		$ 911.3
Accumulated goodwill impairment loss	(808.3)		(808.3)
Goodwill, net of accumulated goodwill impairment loss	86.4		103.0
Goodwill [Roll Forward]
Goodwill, beginning balance	103.0
Goodwill, ending balance	86.4
Ivie and Associates
Goodwill [Roll Forward]
Acquisitions	(16.6)
United States Print and Related Services
Goodwill [Line Items]
Goodwill	864.7		881.3
Accumulated goodwill impairment loss	(778.3)		(778.3)
Goodwill, net of accumulated goodwill impairment loss	86.4	$ 86.4	103.0
Goodwill [Roll Forward]
Goodwill, beginning balance	103.0
Goodwill, ending balance	86.4
United States Print and Related Services \| Ivie and Associates
Goodwill [Roll Forward]
Acquisitions	(16.6)
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
Goodwill [Roll Forward]
Goodwill, beginning balance	0.0
Goodwill, ending balance	0.0
International \| Ivie and Associates
Goodwill [Roll Forward]
Acquisitions	$ 0.0