CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Statement [Abstract]
Revenues	$ 664.9	$ 684.3
Cost of revenues	410.0	423.3
Gross profit	254.9	261.0
Selling, general and administrative expenses	216.0	216.0
Divestiture losses, net (Note 4)	0.0	5.0
Income from operations	38.9	40.0
Interest expense, net	(18.4)	(20.4)
Other income, net	0.0	0.2
Income before income taxes	20.5	19.8
Income tax expense	(7.4)	(8.5)
Net income	13.1	11.3
Net income attributable to noncontrolling interests	0.0	(0.1)
Net income attributable to Stericycle, Inc. common shareholders	$ 13.1	$ 11.2
Income per common share attributable to Stericycle, Inc. common shareholders:
Basic (in dollars per share)	$ 0.14	$ 0.12
Diluted (in dollars per share)	$ 0.14	$ 0.12
Weighted average number of common shares outstanding:
Basic (in shares)	92.6	92.3
Diluted (in shares)	93.0	92.7