Acquisitions (Pro Forma Results) (Details) (Company, Genesis, Libredigital, Sequence, Helium, Journalism Online, Bowne, Nimblefish, And 8Touches [Member], USD $) In Millions, except Per Share data	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Company, Genesis, Libredigital, Sequence, Helium, Journalism Online, Bowne, Nimblefish, And 8Touches [Member]
Business Acquisition [Line Items]
Net sales	$ 2,686.5	$ 2,645.8	$ 7,906.1	$ 7,867.0
Net earnings attributable to RR Donnelley common shareholders	$ 164.3	$ 26.1	$ 241.8	$ 137.8
Basic	$ 0.87	$ 0.13	$ 1.23	$ 0.67
Diluted	$ 0.86	$ 0.12	$ 1.21	$ 0.66

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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