Equity - Schedule of Equity Activity (Detail) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity [Line Items]
Beginning Balance	$ (243.8)	$ (254.4)	$ (243.8)	$ (465.9)	$ (416.6)	$ (370.3)	$ (243.8)	$ (370.3)
Net (loss) income	28.1	(9.2)	(1.1)	(8.7)	(57.2)	(12.9)	17.8	(78.8)
Other comprehensive (loss) income	(9.2)	17.5	(6.6)	18.5	6.2	(31.2)	1.7	(6.5)
Share-based compensation	1.3	2.4	0.2	1.3	1.8	1.4
Issuance of share-based awards, net of withholdings and other		(0.1)	(2.4)		(0.1)	(0.5)
Cash dividends paid						$ (2.1)
Accounting Standards Update [Extensible List]						us-gaap:AccountingStandardsUpdate201602Member
Distributions to noncontrolling interests			(0.7)			$ (0.7)
Ending Balance	(223.6)	(243.8)	(254.4)	(454.8)	(465.9)	(416.6)	(223.6)	(454.8)
Cumulative Effect, Period of Adoption, Adjustment
Equity [Line Items]
Beginning Balance						(0.3)		(0.3)
Common Stock
Equity [Line Items]
Beginning Balance	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
Ending Balance	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
Additional Paid-in Capital
Equity [Line Items]
Beginning Balance	3,030.0	3,105.4	3,263.6	3,261.2	3,267.1	3,348.0	3,263.6	3,348.0
Share-based compensation	1.3	2.4	0.2	1.3	1.8	1.4
Issuance of share-based awards, net of withholdings and other	(8.8)	(77.8)	(158.4)		(7.7)	(82.3)
Ending Balance	3,022.5	3,030.0	3,105.4	3,262.5	3,261.2	3,267.1	3,022.5	3,262.5
Treasury Stock
Equity [Line Items]
Beginning Balance	(893.9)	(971.6)	(1,127.6)	(1,130.2)	(1,137.8)	(1,219.6)	(1,127.6)	(1,219.6)
Issuance of share-based awards, net of withholdings and other	8.8	77.7	156.0		7.6	81.8
Ending Balance	(885.1)	(893.9)	(971.6)	(1,130.2)	(1,130.2)	(1,137.8)	(885.1)	(1,130.2)
Accumulated Deficit
Equity [Line Items]
Beginning Balance	(2,251.4)	(2,242.0)	(2,240.7)	(2,409.4)	(2,352.2)	(2,336.8)	(2,240.7)	(2,336.8)
Net (loss) income	28.3	(9.4)	(1.3)	(8.9)	(57.2)	(13.0)
Cash dividends paid						(2.1)
Ending Balance	(2,223.1)	(2,251.4)	(2,242.0)	(2,418.3)	(2,409.4)	(2,352.2)	(2,223.1)	(2,418.3)
Accumulated Deficit | Cumulative Effect, Period of Adoption, Adjustment
Equity [Line Items]
Beginning Balance						(0.3)		(0.3)
Accumulated Other Comprehensive Loss
Equity [Line Items]
Beginning Balance	(142.9)	(160.3)	(153.9)	(201.0)	(207.2)	(176.2)	(153.9)	(176.2)
Other comprehensive (loss) income	(9.2)	17.4	(6.4)	18.1	6.2	(31.0)	1.8	(6.7)
Ending Balance	(152.1)	(142.9)	(160.3)	(182.9)	(201.0)	(207.2)	(152.1)	(182.9)
RRD Stockholders' Equity
Equity [Line Items]
Beginning Balance	(257.3)	(267.6)	(257.7)	(478.5)	(429.2)	(383.7)	(257.7)	(383.7)
Net (loss) income	28.3	(9.4)	(1.3)	(8.9)	(57.2)	(13.0)
Other comprehensive (loss) income	(9.2)	17.4	(6.4)	18.1	6.2	(31.0)
Share-based compensation	1.3	2.4	0.2	1.3	1.8	1.4
Issuance of share-based awards, net of withholdings and other		(0.1)	(2.4)		(0.1)	(0.5)
Cash dividends paid						(2.1)
Ending Balance	(236.9)	(257.3)	(267.6)	(468.0)	(478.5)	(429.2)	(236.9)	(468.0)
RRD Stockholders' Equity | Cumulative Effect, Period of Adoption, Adjustment
Equity [Line Items]
Beginning Balance						(0.3)		(0.3)
Noncontrolling Interests
Equity [Line Items]
Beginning Balance	13.5	13.2	13.9	12.6	12.6	13.4	13.9	13.4
Net (loss) income	(0.2)	0.2	0.2	0.2		0.1
Other comprehensive (loss) income		0.1	(0.2)	0.4		(0.2)
Distributions to noncontrolling interests			(0.7)			(0.7)
Ending Balance	$ 13.3	$ 13.5	$ 13.2	$ 13.2	$ 12.6	$ 12.6	$ 13.3	$ 13.2