Earnings per Share - Earnings per Share Reconciliation (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Basic and diluted net (loss) earnings per share attributable to RRD common stockholders:
Continuing Operations	$ (0.13)	$ (0.79)	$ (0.16)	$ (0.70)
Discontinued Operations			0.01	(0.28)
Net loss attributable to RR Donnelley stockholders	$ (0.13)	$ (0.79)	$ (0.15)	$ (0.98)
Net loss attributable to RRD common stockholders - continuing operations	$ (9.4)	$ (57.2)	$ (11.3)	$ (50.3)
Net earnings (loss) from discontinued operations, net of income taxes			0.6	(19.9)
Net loss attributable to RRD common stockholders	$ (9.4)	$ (57.2)	$ (10.7)	$ (70.2)
Weighted average number of common shares outstanding - Basic and Diluted	73.3	72.2	73.0	71.9
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.8	1.8	0.9	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	0.2	0.3	0.2	0.3
Restricted stock units
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.6	1.5	0.7	1.1