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Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill, Gross	$ 911.3
Accumulated goodwill impairment loss	(808.3)
Goodwill	103.0	$ 103.0
United States Print and Related Services
Goodwill [Line Items]
Goodwill, Gross	881.3
Accumulated goodwill impairment loss	(778.3)
Goodwill	103.0
International
Goodwill [Line Items]
Goodwill, Gross	30.0
Accumulated goodwill impairment loss	(30.0)
Goodwill	$ 0.0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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+ References

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-Name Accounting Standards Codification
-Topic 350
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-Paragraph 1
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