Acquisitions (Pro Forma Financial Information) (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Business Acquisition [Line Items]
Net sales	$ 2,521.5	$ 2,707.7	$ 7,614.7	$ 7,959.0
Net earnings attributable to RR Donnelley common shareholders	$ 75.3	$ 154.8	$ 204.4	$ 177.1
Basic	$ 0.42	$ 0.82	$ 1.13	$ 0.90
Diluted	$ 0.41	$ 0.81	$ 1.12	$ 0.89