Earnings per Share - Earnings per Share Reconciliation (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net income (loss) per share attributable to RRD common stockholders:
Basic	$ 0.49	$ (0.11)	$ 0.17	$ 0.26
Diluted	$ 0.49	$ (0.11)	$ 0.17	$ 0.26
Net income (loss) attributable to RRD common stockholders	$ 34.3	$ (8.0)	$ 11.7	$ 18.4
Basic weighted average number of common shares outstanding	70.6	70.2	70.5	70.1
Dilutive options and awards	0.1		0.3	0.2
Diluted weighted average number of common shares outstanding	70.7	70.2	70.8	70.3
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	1.2	2.4	1.5	1.7
Dividends declared per common share	$ 0.03	$ 0.14	$ 0.31	$ 0.42
Stock options
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.7	1.3	0.9	1.0
Restricted stock units
Weighted average number of anti-dilutive share-based awards:
Weighted average antidilutive securities excluded from computation of earnings per share	0.5	1.1	0.6	0.7

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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