CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenues	$ 2,704.7	$ 2,646.9	$ 2,675.5
Cost of revenues	1,679.1	1,629.7	1,622.4
Gross profit	1,025.6	1,017.2	1,053.1
Selling, general and administrative expenses	887.5	946.6	897.6
Divestiture (gains) losses, net	(15.6)	(1.7)	123.6
Income from operations	153.7	72.3	31.9
Interest (expense) income, net	(75.5)	(71.9)	(81.9)
Other income (expense), net	0.7	0.3	(6.0)
Income (loss) before income taxes	78.9	0.7	(56.0)
Income tax (expense) benefit	(22.4)	(27.5)	0.1
Net income (loss)	56.5	(26.8)	(55.9)
Net income attributable to noncontrolling interests	(0.5)	(1.0)	(1.4)
Net income (loss) attributable to Stericycle, Inc. common shareholders	$ 56.0	$ (27.8)	$ (57.3)
Earnings (loss) per common share attributable to Stericycle, Inc. common shareholders:
Basic (in dollars per share)	$ 0.61	$ (0.30)	$ (0.63)
Diluted (in dollars per share)	$ 0.61	$ (0.30)	$ (0.63)
Weighted average number of common shares Outstanding:
Basic (in shares)	92.1	91.8	91.5
Diluted (in shares)	92.4	91.8	91.5