CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenues	$ 684.3	$ 664.2
Cost of revenues	423.3	419.7
Gross profit	261.0	244.5
Selling, general and administrative expenses	216.0	238.6
Divestiture losses, net	5.0	0.0
Income from operations	40.0	5.9
Interest expense, net	(20.4)	(16.3)
Other income (expense), net	0.2	(0.8)
Income (Loss) before income taxes	19.8	(11.2)
Income tax expense	(8.5)	(2.9)
Net income (loss)	11.3	(14.1)
Net income attributable to noncontrolling interests	(0.1)	(0.1)
Net income (loss) attributable to Stericycle, Inc. common shareholders	$ 11.2	$ (14.2)
Income (Loss) per common share attributable to Stericycle, Inc. common shareholders:
Basic (in dollars per share)	$ 0.12	$ (0.15)
Diluted (in dollars per share)	$ 0.12	$ (0.15)
Weighted average number of common shares outstanding:
Basic (in shares)	92.3	92.0
Diluted (in shares)	92.7	92.0