CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,145.6	$ 1,009.6	$ 2,318.7	$ 2,226.5
Cost of sales	928.1	817.3	1,877.1	1,785.9
Gross profit	217.5	192.3	441.6	440.6
Selling, general and administrative expenses (exclusive of depreciation and amortization)	143.8	138.8	297.1	298.7
Restructuring, impairment and other expense -net (Note 7)	9.7	28.4	15.5	39.6
Depreciation and amortization	32.9	36.9	66.7	76.1
Other operating expense	2.9	7.2	9.0	12.1
Income (loss) from operations	28.2	(19.0)	53.3	14.1
Interest expense-net	38.5	34.6	69.0	68.5
Loss on debt extinguishment	6.2	0.4	6.2	0.2
Investment and other income-net	(4.9)	(3.4)	(9.7)	(7.2)
Loss from continuing operations before income taxes	(11.6)	(50.6)	(12.2)	(47.4)
Income tax (benefit) expense	(2.4)	6.6	(1.3)	2.8
Net loss from continuing operations	(9.2)	(57.2)	(10.9)	(50.2)
(Loss) gain on sale of discontinued operations, net of tax		(1.3)	0.6	(6.3)
Gain (loss) from discontinued operations, net of tax		1.3		(13.6)
Net income (loss) from discontinued operations (Note 2)			0.6	(19.9)
Net loss	(9.2)	(57.2)	(10.3)	(70.1)
Less: income attributable to noncontrolling interests	0.2		0.4	0.1
Net loss attributable to RRD common stockholders	$ (9.4)	$ (57.2)	$ (10.7)	$ (70.2)
Basic and diluted net (loss) earnings per share attributable to RRD common stockholders (Note 11):
Continuing Operations	$ (0.13)	$ (0.79)	$ (0.16)	$ (0.70)
Discontinued Operations			0.01	(0.28)
Net loss attributable to RR Donnelley stockholders	$ (0.13)	$ (0.79)	$ (0.15)	$ (0.98)
Weighted average number of common shares outstanding:
Basic	73.3	72.2	73.0	71.9
Diluted	73.3	72.2	73.0	71.9