Acquisitions and Dispositions – Pro-Forma Financial Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2015 USD ($) $ / shares
Business Combinations [Abstract]
Net sales	$ 2,806.7
Net earnings attributable to RR Donnelley common shareholders	$ 33.4
Net earnings per share attributable to RR Donnelley common shareholders:
Basic | $ / shares	$ 0.16
Diluted | $ / shares	$ 0.16
Amortization of purchased intangibles	$ 21.4
Restructuring, impairment and other charges	$ 17.2