Earnings per Share - Earnings per Share Reconciliation (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic and diluted net (loss) earnings per share attributable to RRD common stockholders:
Continuing Operations	$ (0.03)	$ 0.10
Discontinued Operations	0.01	(0.28)
Net loss attributable to RR Donnelley stockholders	$ (0.02)	$ (0.18)
Net (loss) earnings attributable to RRD common stockholders - continuing operations	$ (1.9)	$ 6.9
Net earnings (loss) from discontinued operations, net of income taxes	0.6	(19.9)
Net loss attributable to RRD common stockholders	$ (1.3)	$ (13.0)
Weighted average number of common shares outstanding - Basic and Diluted	72.7	71.6
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	1.1	1.4
Dividends declared per common share		$ 0.03
Stock options
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.3	0.4
Restricted stock units
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.8	1.0