CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net sales	$ 1,267.8	$ 1,191.3	$ 3,586.5	$ 3,417.7
Cost of sales	1,012.9	943.6	2,890.0	2,729.4
Gross profit	254.9	247.7	696.5	688.3
Selling, general and administrative expenses (exclusive of depreciation and amortization)	141.2	138.0	438.3	436.7
Restructuring, impairment and other expense -net (Note 7)	4.0	54.2	19.5	93.8
Depreciation and amortization	32.3	36.2	99.0	112.3
Other operating expense	4.3	3.4	13.3	15.5
Income from operations	73.1	15.9	126.4	30.0
Interest expense-net	29.4	34.3	98.4	102.7
Loss on debt extinguishment		0.2	6.2	0.4
Investment and other income-net	(5.4)	(3.6)	(15.1)	(10.8)
Income (loss) from continuing operations before income taxes	49.1	(15.0)	36.9	(62.3)
Income tax expense (benefit)	21.0	(5.9)	19.7	(3.0)
Net income (loss) from continuing operations	28.1	(9.1)	17.2	(59.3)
Gain (loss) on sale of discontinued operations, net of tax			0.6	(6.9)
Gain (loss) from discontinued operations, net of tax		0.4		(12.6)
Net income (loss) from discontinued operations (Note 2)		0.4	0.6	(19.5)
Net income (loss)	28.1	(8.7)	17.8	(78.8)
Less: (loss) income attributable to noncontrolling interests	(0.2)	0.2	0.2	0.3
Net income (loss) attributable to RRD common stockholders	$ 28.3	$ (8.9)	$ 17.6	$ (79.1)
Basic net earnings (loss) per share attributable to RRD common stockholders (Note 11):
Continuing Operations	$ 0.39	$ (0.13)	$ 0.23	$ (0.83)
Discontinued Operations		0.01	0.01	(0.27)
Net earnings (loss) attributable to RR Donnelley stockholders	0.39	(0.12)	0.24	(1.10)
Diluted net earnings (loss) per share attributable to RRD common stockholders (Note 11):
Continuing Operations	0.38	(0.13)	0.23	(0.83)
Discontinued Operations		0.01	0.01	(0.27)
Net earnings (loss) attributable to RR Donnelley stockholders	$ 0.38	$ (0.12)	$ 0.24	$ (1.10)
Weighted average number of common shares outstanding:
Basic	73.4	72.4	73.1	72.1
Diluted	74.1	72.4	74.0	72.1