Pro Forma Financial Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition [Line Items]
Net sales	$ 10,461.1	$ 10,837.1
Net loss attributable to RR Donnelley common shareholders	$ (641.8)	$ (149.5)
Basic	$ (3.56)	$ (0.77)
Diluted	$ (3.56)	$ (0.77)