REVENUES FROM CONTRACTS WITH CUSTOMERS (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Revenues Disaggregated by Service, Primary Geographical Regions and Timing of Revenue Recognition

In millions
	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Revenue by Service
Regulated Waste and Compliance Services	$	461.7	$	449.1	$	1,398.3	$	1,461.7
Secure Information Destruction Services	187.2		187.3		591.3		557.9
Total Revenues	$	648.9	$	636.4	$	1,989.6	$	2,019.6
North America
Regulated Waste and Compliance Services	$	365.4	$	353.7	$	1,094.4	$	1,176.2
Secure Information Destruction Services	158.5		163.4		505.8		486.8
Total North America Segment	$	523.9	$	517.1	$	1,600.2	$	1,663.0
International
Regulated Waste and Compliance Services	$	96.3	$	95.4	$	303.9	$	285.5
Secure Information Destruction Services	28.7		23.9		85.5		71.1
Total International Segment	$	125.0	$	119.3	$	389.4	$	356.6

Schedule of Total Contract Acquisition Costs

Total contract acquisition costs, net of accumulated amortization, were classified as follows:

In millions
	September 30, 2021		December 31, 2020
Other current assets	$	11.9	$	11.1
Other assets	32.7		31.1
Total contract acquisition costs	$	44.6	$	42.2

Schedule of Allowance for Credit Loss Activity

The changes in allowance for doubtful accounts were reported as follows:

In millions
	Total
Balance as of December 31, 2020	$	56.2
Bad debt expense, net of recoveries	2.8
Write-offs	(13.3)
Other changes(1)	(3.1)
Balance as of September 30, 2021	$	42.6

(1) Amount consists primarily of currency translation adjustments and divestitures.