CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (21.3)	$ 56.5	$ (26.8)
Other comprehensive income (loss):
Currency translation adjustments	19.3	(58.1)	(35.5)
Cumulative currency translation loss realized from divestitures	70.6	0.0	3.8
Total other comprehensive income (loss)	89.9	(58.1)	(31.7)
Comprehensive income (loss)	68.6	(1.6)	(58.5)
Less: comprehensive income attributable to noncontrolling interests	(2.4)	0.5	0.7
Comprehensive income (loss) attributable to Stericycle, Inc. common shareholders	$ 71.0	$ (2.1)	$ (59.2)