Earnings per Share - Earnings per Share Reconciliation (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Basic and diluted net (loss) earnings per share attributable to RRD common stockholders (Note 14):
Continuing operations	$ (0.37)	$ (0.07)	$ (0.45)
Discontinued operations	1.73	(1.24)	0.29
Net earnings (loss) attributable to RRD stockholders	$ 1.36	$ (1.31)	$ (0.16)
Net loss from continuing operations	$ (26.4)	$ (4.8)	$ (31.6)
Net income (loss) from discontinued operations	124.9	(88.4)	20.6
Net income (loss) attributable to RRD common stockholders	$ 98.5	$ (93.2)	$ (11.0)
Basic and diluted weighted average number of common shares outstanding	72.3	71.2	70.6
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	1.4	1.5	1.6
Dividends declared per common share	$ 0.03	$ 0.12	$ 0.34
Stock options
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.3	0.5	0.8
Restricted stock units
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	1.1	1.0	0.8