CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 28.1	$ (8.7)	$ 17.8	$ (78.8)
Other comprehensive (loss) income, net of tax (Note 12):
Translation adjustments	(10.4)	17.4	(10.6)	4.2
Adjustments for net periodic pension and postretirement benefits plan cost	1.0	0.8	3.1	2.3
Changes in fair value of derivatives	0.2	0.3	9.2	(13.0)
Other comprehensive (loss) income	(9.2)	18.5	1.7	(6.5)
Comprehensive income (loss)	18.9	9.8	19.5	(85.3)
Less: comprehensive (loss) income attributable to non-controlling interests	(0.2)	0.6	0.1	0.5
Comprehensive income (loss) attributable to RRD common stockholders	$ 19.1	$ 9.2	$ 19.4	$ (85.8)