CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 11.3	$ (14.1)
Other comprehensive income (loss):
Currency translation adjustments	7.9	(8.9)
Total other comprehensive income (loss)	7.9	(8.9)
Comprehensive income (loss)	19.2	(23.0)
Less: comprehensive (loss) attributable to noncontrolling interests	(2.2)	(0.1)
Comprehensive income (loss) attributable to Stericycle, Inc. common shareholders	$ 21.4	$ (22.9)