CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 99.0	$ (92.7)	$ (9.6)
Other comprehensive income (loss), net of tax (Note 15):
Translation adjustments	27.8	7.0	(39.9)
Adjustment for net periodic pension and other postretirement benefits plan cost	7.2	(30.5)	11.4
Changes in fair value of derivatives	(12.0)	1.0
Other comprehensive income (loss)	23.0	(22.5)	(28.5)
Comprehensive income (loss)	122.0	(115.2)	(38.1)
Less: comprehensive income attributable to noncontrolling interests	1.2	0.4	1.0
Comprehensive income (loss) attributable to RRD common stockholders	$ 120.8	$ (115.6)	$ (39.1)