Acquisitions and Dispositions - Pro Forma Financial Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Combinations [Abstract]
Net sales	$ 2,828.0	$ 3,040.6	$ 8,445.5	$ 8,897.9
Business acquisition, loss before income taxes	$ 22.5	$ 70.5	$ 118.0	$ 107.0
Net earnings per share attributable to RR Donnelley common shareholders:
Basic	$ 0.11	$ 0.34	$ 0.56	$ 0.51
Diluted	$ 0.11	$ 0.34	$ 0.56	$ 0.51
Amortization of purchased intangibles	$ 20.4	$ 22.0	$ 63.0	$ 67.8
Restructuring, impairment and other charges	$ 48.4	$ 16.9	$ 76.7	$ 86.1

Business acquisitions pro forma amortization of purchased intangibles.

No definition available.

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- Definition

Business acquisitions pro forma restructuring and impairment charges.

+ References

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

+ References

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- References

No definition available.

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