CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 6.0	$ (49.5)	$ 19.1	$ (38.2)
Other comprehensive (loss) income:
Currency translation adjustments	(1.6)	6.1	(13.1)	14.0
Cumulative currency translation loss realized from divestitures (Note 4)	0.0	69.6	0.0	69.6
Total other comprehensive (loss) income	(1.6)	75.7	(13.1)	83.6
Comprehensive income	4.4	26.2	6.0	45.4
Less: comprehensive (loss) attributable to noncontrolling interests	0.0	0.0	0.0	(2.2)
Comprehensive income attributable to Stericycle, Inc. common shareholders	$ 4.4	$ 26.2	$ 6.0	$ 47.6