Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (10.7)	$ 52.6	$ 158.5	$ 201.7
Other comprehensive (loss) income, net of tax:
Translation adjustments and related hedging instruments	(61.1)	(29.4)	(120.4)	(70.9)
Cash flow hedges	0.2	0.7	2.3	2.2
Total other comprehensive loss	(60.9)	(28.7)	(118.1)	(68.7)
Total comprehensive (loss) income	(71.6)	23.9	40.4	133.0
Comprehensive loss (income) attributable to noncontrolling interests	0.4	0.3	0.1	(0.7)
Comprehensive (loss) income attributable to Avient common shareholders	$ (71.2)	$ 24.2	$ 40.5	$ 132.3