The Company provides regulated and compliance services, which include the collection and processing of regulated and specialized waste for disposal, the collection of personal and confidential information for secure destruction, Expert Solutions, and communication services. The associated activities for each of these are a series of distinct services that are substantially the same and have the same pattern of transfer over time; therefore, the respective services are treated as a single performance obligation.

Our customers typically enter into a contract for the provision of services on a regular and scheduled basis, e.g. weekly, monthly or on an as needed basis over the contract term. Under the contract terms, the Company receives fees based on a monthly, quarterly or annual rate or fees based on contractual rates depending upon measures including the volume, weight and type of waste, number and size of bins collected, weight and type of shredded paper, type of recall service and number of call minutes.

Amounts are invoiced based on the terms of the underlying contract either on a regular basis, e.g. monthly or quarterly, or as services are performed and are generally due within a short period of time after invoicing based upon normal terms and conditions for our business type and the geography of the services performed.

The following table presents our revenues disaggregated by service and primary geographical regions, for the year ended December 31, 2018, and includes a reconciliation of disaggregated revenue to revenue reported by our reportable segments, Domestic and Canada Regulated Waste and Compliance Services (“RCS”) and International RCS:

In millions
	Year ended December 31, 2018
Reportable Segment	Domestic and Canada RCS				International RCS				All Other
Revenues by Service:	United States		Canada		Europe		Others		United States		Total
Medical Waste and Compliance Solutions	$	1,142.4	$	39.6	$	250.8	$	185.7	$	-	$	1,618.5
Secure Information Destruction Services		712.6		65.7		120.7		12.0		-		911.0
Hazardous Waste Solutions		314.1		-		-		-		-		314.1
Manufacturing and Industrial Services		247.8		22.6		16.9		41.9		-		329.2
Communication Services		-		17.3		18.4		-		148.4		184.1
Expert Solutions		-		12.0		8.7		-		108.3		129.0
Total	$	2,416.9	$	157.2	$	415.5	$	239.6	$	256.7	$	3,485.9

The contract liability at December 31, 2018 and 2017 was $15.0 million and $17.9 million, respectively. The balance in contract liability as of December 31, 2017 was recognized as revenue during the year ended December 31, 2018.

We had $8.5 million and $23.3 million of contract acquisition costs, included in Other current assets and Other assets, respectively, on the Consolidated Balance Sheets as of December 31, 2018. During the year ended December 31, 2018, we amortized $6.9 million of sales incentives to SG&A. Contract acquisition costs are amortized to SG&A over a weighted average life of 6.3 years.