Condensed Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning balance, shares at Dec. 31, 2022		56.6		3.9
Beginning balance, Quad's shareholders equity at Dec. 31, 2022	$ 172.9	$ 1.4	$ 841.8	$ (23.5)	$ (518.5)	$ (128.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(24.6)				(24.6)
Foreign currency translation adjustments	6.5					6.5
Interest rate derivatives adjustments, net of tax	0.6					0.6
Pension benefit plan liability adjustments, net of tax	(0.1)					(0.1)
Stock-based compensation	1.0		1.0
Purchases of treasury stock (in shares)				(0.1)
Purchases of treasury stock	(0.3)			$ (0.3)
Issuance of share-based awards, net of other activity, shares				1.4
Issuance of share-based awards, net of other activity	0.0		(4.3)	$ 4.3
Equity awards redeemed to pay employees’ tax obligations, shares				(0.3)
Equity awards redeemed to pay employees’ tax obligations	(1.7)			$ (1.7)
Ending balance, shares at Mar. 31, 2023		56.6		2.9
Ending balance, Quad's shareholders' equity at Mar. 31, 2023	154.5	$ 1.4	838.5	$ (21.2)	(543.1)	(121.1)
Beginning balance, shares at Dec. 31, 2022		56.6		3.9
Beginning balance, Quad's shareholders equity at Dec. 31, 2022	172.9	$ 1.4	841.8	$ (23.5)	(518.5)	(128.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(33.4)
Ending balance, shares at Sep. 30, 2023		56.6		(5.0)
Ending balance, Quad's shareholders' equity at Sep. 30, 2023	143.4	$ 1.4	841.1	$ (30.1)	(551.9)	(117.1)
Beginning balance, shares at Mar. 31, 2023		56.6		2.9
Beginning balance, Quad's shareholders equity at Mar. 31, 2023	154.5	$ 1.4	838.5	$ (21.2)	(543.1)	(121.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(6.1)				(6.1)
Foreign currency translation adjustments	6.3					6.3
Interest rate derivatives adjustments, net of tax	1.2					1.2
Pension benefit plan liability adjustments, net of tax	0.1					0.1
Stock-based compensation	2.3		2.3
Purchases of treasury stock (in shares)				(1.3)
Purchases of treasury stock	(4.7)			$ (4.7)
Issuance of share-based awards, net of other activity, shares				(0.2)
Issuance of share-based awards, net of other activity	0.0		(1.0)	$ 1.0
Ending balance, shares at Jun. 30, 2023		56.6		4.0
Ending balance, Quad's shareholders' equity at Jun. 30, 2023	153.6	$ 1.4	839.8	$ (24.9)	(549.2)	(113.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2.7)				(2.7)
Foreign currency translation adjustments	(4.4)					(4.4)
Interest rate derivatives adjustments, net of tax	0.7					0.7
Pension benefit plan liability adjustments, net of tax	0.1					0.1
Stock-based compensation	1.3		1.3
Purchases of treasury stock (in shares)				(1.0)
Purchases of treasury stock	(5.2)			$ (5.2)
Ending balance, shares at Sep. 30, 2023		56.6		(5.0)
Ending balance, Quad's shareholders' equity at Sep. 30, 2023	143.4	$ 1.4	841.1	$ (30.1)	(551.9)	(117.1)
Beginning balance, shares at Dec. 31, 2023		56.6		5.6
Beginning balance, Quad's shareholders equity at Dec. 31, 2023	119.5	$ 1.4	842.7	$ (33.1)	(573.9)	(117.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(28.1)				(28.1)
Foreign currency translation adjustments	(0.4)					(0.4)
Interest rate derivatives adjustments, net of tax	0.9					0.9
Pension benefit plan liability adjustments, net of tax	(0.2)					(0.2)
Cash dividends declared	(2.6)				(2.6)
Stock-based compensation	1.8		1.8
Conversion of class B shares, shares		(0.3)		0.3
Conversion of class B shares	0.0		(1.3)	$ 1.3
Issuance of share-based awards, net of other activity, shares				1.3
Issuance of share-based awards, net of other activity	0.0		(5.2)	$ 5.2
Equity awards redeemed to pay employees’ tax obligations, shares				(0.3)
Equity awards redeemed to pay employees’ tax obligations	(2.1)			$ (2.1)
Ending balance, shares at Mar. 31, 2024		56.3		4.3
Ending balance, Quad's shareholders' equity at Mar. 31, 2024	$ 89.2	$ 1.4	838.0	$ (28.7)	(604.6)	(116.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividend declared (USD per share)	$ 0.05
Beginning balance, shares at Dec. 31, 2023		56.6		5.6
Beginning balance, Quad's shareholders equity at Dec. 31, 2023	$ 119.5	$ 1.4	842.7	$ (33.1)	(573.9)	(117.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(55.6)
Ending balance, shares at Sep. 30, 2024		56.3		(4.1)
Ending balance, Quad's shareholders' equity at Sep. 30, 2024	50.9	$ 1.4	841.3	$ (27.9)	(637.2)	(126.7)
Beginning balance, shares at Mar. 31, 2024		56.3		4.3
Beginning balance, Quad's shareholders equity at Mar. 31, 2024	89.2	$ 1.4	838.0	$ (28.7)	(604.6)	(116.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2.8)				(2.8)
Foreign currency translation adjustments	(7.1)					(7.1)
Interest rate derivatives adjustments, net of tax	(0.4)					(0.4)
Pension benefit plan liability adjustments, net of tax	0.2					0.2
Cash dividends declared	(2.6)				(2.6)
Stock-based compensation	2.6		2.6
Issuance of share-based awards, net of other activity, shares				0.2
Issuance of share-based awards, net of other activity	0.0		(1.0)	$ 1.0
Ending balance, shares at Jun. 30, 2024		56.3		4.1
Ending balance, Quad's shareholders' equity at Jun. 30, 2024	$ 79.1	$ 1.4	839.6	$ (27.7)	(610.0)	(124.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividend declared (USD per share)	$ 0.05
Net loss	$ (24.7)				(24.7)
Foreign currency translation adjustments	(1.4)					(1.4)
Interest rate derivatives adjustments, net of tax	(1.3)					(1.3)
Pension benefit plan liability adjustments, net of tax	0.2					0.2
Cash dividends declared	(2.5)				(2.5)
Stock-based compensation	1.5		1.5
Issuance of share-based awards, net of other activity	0.0		0.2	$ (0.2)
Ending balance, shares at Sep. 30, 2024		56.3		(4.1)
Ending balance, Quad's shareholders' equity at Sep. 30, 2024	$ 50.9	$ 1.4	$ 841.3	$ (27.9)	$ (637.2)	$ (126.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash dividend declared (USD per share)	$ 0.05