CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net loss	$ (26.8)	$ (55.9)	$ (346.0)
Other comprehensive (loss) income:
Currency translation adjustments	(35.5)	44.0	8.8
Amortization of cash flow hedge into income, net of tax expense	0.0	0.0	0.4
Change in fair value of cash flow hedge, net of tax expense	0.0	0.0	0.3
Accelerated amortization of interest rate lock premiums, net of tax expense	0.0	0.0	2.3
Total other comprehensive (loss) income	(31.7)	131.2	47.5
Comprehensive (loss) income	(58.5)	75.3	(298.5)
Less: comprehensive income attributable to noncontrolling interests	0.7	1.9	1.1
Comprehensive (loss) income attributable to Stericycle, Inc. common shareholders	(59.2)	73.4	(299.6)
Japan
Other comprehensive (loss) income:
Cumulative currency translation loss realized through disposition of operations	3.8	0.0	0.0
Argentina
Other comprehensive (loss) income:
Cumulative currency translation loss realized through disposition of operations	0.0	87.2	0.0
Mexico
Other comprehensive (loss) income:
Cumulative currency translation loss realized through disposition of operations	0.0	0.0	18.9
Chile
Other comprehensive (loss) income:
Cumulative currency translation loss realized through disposition of operations	$ 0.0	$ 0.0	$ 16.8