Revenue

12 Months Ended

Dec. 31, 2019

29. Revenue

Disaggregation of revenue

The Company provides professional consulting services in engineering, architecture, interior design, landscape architecture, surveying, environmental sciences, project management, and project economics throughout North America and globally. The Company has five specialized business operating units: Buildings, Energy & Resources, Environmental Services, Infrastructure, and Water. Revenue is derived principally under

fee-for-service

agreements with clients. Disaggregation of revenue by geographic area and service is included in note 35.

Significant increases (decreases) in contract assets and deferred revenue in the year are as follows:


			For the year ended

			December 31, 2019				December 31, 2018

			Contract		Deferred		Contract			Deferred
			Assets		Revenue		Assets			Revenue

	Note		$		$		$			$
Acquisitions				1.1		4.6		0.7			7.2
Discontinued operations and disposition of subsidiaries		8		-		-		(15.3	)		(59.3	)

Revenue recognized in 2019 and included in deferred revenue at January 1, 2019, was $174.4 (2018 – $196.4).

Revenue recognized in 2019 from performance obligations satisfied (or partially satisfied) in prior years was less than 5% (2018 – 5%) of the Company’s gross revenue from continuing operations.

Remaining performance obligations (backlog)

The aggregate amount of estimated revenue related to performance obligations that are unsatisfied (or partially unsatisfied) as at December 31, 2019, was $4,257 (2018 – $4,179). This amount includes all contracts with customers but excludes variable consideration that is not highly probable. The Company expects to recognize approximately 77% (2018 – 77%) of this revenue as contracts are completed over the next 18 months with the remainder recognized thereafter.