Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net earnings (loss)	$ 37.8	$ (128.5)
Translation adjustments
Foreign currency translation adjustments	(8.2)	0.9
Translation of long-term loans to foreign subsidiaries	(1.1)	(0.7)
Total translation adjustments	(9.3)	0.2
Reclassification of foreign currency translation adjustments	(2.7)	0.0
Interest rate swap adjustments, net of tax	7.1	(7.5)
Pension benefit plan adjustments
Net gain arising during period	20.4	3.2
Settlement charge on pension benefit plans included in net earnings (loss)	0.9	0.1
Total pension benefit plan adjustments	21.3	3.3
Other comprehensive income (loss), before tax	16.4	(4.0)
Income tax impact related to items of other comprehensive income (loss)	(6.3)	(0.1)
Other comprehensive income (loss), net of tax	10.1	(4.1)
Total comprehensive income (loss)	47.9	(132.6)
Less: comprehensive loss attributable to noncontrolling interests	0.0	(0.2)
Comprehensive income (loss) attributable to Quad common shareholders	$ 47.9	$ (132.4)