Acquisitions and Dispositions - Pro Forma Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Business Combinations [Abstract]
Net sales	$ 2,957.8	$ 2,952.8	$ 8,686.9	$ 8,699.2
Net earnings attributable to RR Donnelley common shareholders	$ 68.5	$ 16.6	$ 127.3	$ 83.2
Net earnings per share attributable to RR Donnelley common shareholders:
Basic	$ 0.34	$ 0.08	$ 0.64	$ 0.42
Diluted	$ 0.34	$ 0.08	$ 0.63	$ 0.42

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.

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=25497992&loc=d3e1392-128463

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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.

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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.

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

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