CONSOLIDATED STATEMENTS OF (LOSS) INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenues	$ 2,659.3	$ 2,704.7	$ 2,646.9
Cost of revenues	1,644.7	1,679.1	1,629.7
Gross profit	1,014.6	1,025.6	1,017.2
Selling, general and administrative expenses	873.9	887.5	946.6
Divestiture losses (gains), net	63.4	(15.6)	(1.7)
Income from operations	77.3	153.7	72.3
Interest expense, net	(73.9)	(75.5)	(71.9)
Other (expense) income, net	(0.1)	0.7	0.3
Income before income taxes	3.3	78.9	0.7
Income tax expense	(24.6)	(22.4)	(27.5)
Net (loss) income	(21.3)	56.5	(26.8)
Net income attributable to noncontrolling interests	(0.1)	(0.5)	(1.0)
Net (loss) income attributable to Stericycle, Inc. common shareholders	$ (21.4)	$ 56.0	$ (27.8)
(Loss) earnings per common share attributable to Stericycle, Inc. common shareholders:
Basic (in dollars per share)	$ (0.23)	$ 0.61	$ (0.30)
Diluted (in dollars per share)	$ (0.23)	$ 0.61	$ (0.30)
Weighted average number of common shares Outstanding:
Basic (in shares)	92.4	92.1	91.8
Diluted (in shares)	92.4	92.4	91.8