We disaggregate revenue from contracts with customers by major product line and based on the timing of recognition for each of our reportable segments and other operating segments, as we believe such disaggregation best depicts how the nature, amount, timing, and uncertainty of our revenues and cash flows are affected by economic factors, with such disaggregation presented below for the three and nine months ended September 28, 2019 and September 29, 2018:



	Three months ended September 28, 2019
Reportable Segments and All Other	HVAC		Detection and Measurement		Engineered Solutions		All Other		Total

Major product lines
Cooling	$	68.4	$	—	$	—	$	—	$	68.4
Boilers, comfort heating, and ventilation	71.7		—		—		—		71.7
Underground locators and inspection and rehabilitation equipment	—		45.0		—		—		45.0
Signal monitoring, obstruction lighting, and bus fare collection systems	—		52.6		—		—		52.6
Power transformers	—		—		93.4		—		93.4
Process cooling equipment and services, and heat exchangers	—		—		27.7		0.9		28.6
South African projects	—		—		—		5.1		5.1
	$	140.1	$	97.6	$	121.1	$	6.0	$	364.8

Timing of Revenue Recognition
Revenues recognized at a point in time	$	140.1	$	91.0	$	12.6	$	0.4	$	244.1
Revenues recognized over time	—		6.6		108.5		5.6		120.7
	$	140.1	$	97.6	$	121.1	$	6.0	$	364.8



	Nine months ended September 28, 2019
Reportable Segments and All Other	HVAC		Detection and Measurement		Engineered Solutions		All Other			Total

Major product lines
Cooling	$	194.3	$	—	$	—	$	—		$	194.3
Boilers, comfort heating, and ventilation	205.1		—		—		—			205.1
Underground locators and inspection and rehabilitation equipment	—		144.7		—		—			144.7
Signal monitoring, obstruction lighting, and bus fare collection systems	—		139.7		—		—			139.7
Power transformers	—		—		296.8		—			296.8
Process cooling equipment and services, and heat exchangers	—		—		101.3		7.7			109.0
South African projects ⁽¹⁾	—		—		—		(8.8		)	(8.8		)
	$	399.4	$	284.4	$	398.1	$	(1.1	)	$	1,080.8

Timing of Revenue Recognition
Revenues recognized at a point in time	$	399.4	$	266.7	$	38.0	$	2.0		$	706.1
Revenues recognized over time ⁽¹⁾	—		17.7		360.1		(3.1		)	374.7
	$	399.4	$	284.4	$	398.1	$	(1.1	)	$	1,080.8



	Three months ended September 29, 2018
Reportable Segments and All Other	HVAC		Detection and Measurement		Engineered Solutions		All Other		Total

Major product lines
Cooling	$	65.1	$	—	$	—	$	—	$	65.1
Boilers, comfort heating, and ventilation	66.9		—		—		—		66.9
Underground locators and inspection and rehabilitation equipment	—		49.8		—		—		49.8
Signal monitoring, obstruction lighting, and bus fare collection systems	—		34.5		—		—		34.5
Power transformers	—		—		89.4		—		89.4
Process cooling equipment and services, and heat exchangers	—		—		35.4		11.6		47.0
South African projects	—		—		—		9.8		9.8
	$	132.0	$	84.3	$	124.8	$	21.4	$	362.5

Timing of Revenue Recognition
Revenues recognized at a point in time	$	132.0	$	79.5	$	15.2	$	1.9	$	228.6
Revenues recognized over time	—		4.8		109.6		19.5		133.9
	$	132.0	$	84.3	$	124.8	$	21.4	$	362.5



	Nine months ended September 29, 2018
Reportable Segments and All Other	HVAC		Detection and Measurement		Engineered Solutions		All Other		Total

Major product lines
Cooling	$	201.6	$	—	$	—	$	—	$	201.6
Boilers, comfort heating, and ventilation	197.8		—		—		—		197.8
Underground locators and inspection and rehabilitation equipment	—		110.7		—		—		110.7
Signal monitoring, obstruction lighting, and bus fare collection systems	—		113.8		—		—		113.8
Power transformers	—		—		274.9		—		274.9
Process cooling equipment and services, and heat exchangers	—		—		113.1		42.9		156.0
South African projects	—		—		—		38.8		38.8
	$	399.4	$	224.5	$	388.0	$	81.7	$	1,093.6

Timing of Revenue Recognition
Revenues recognized at a point in time	$	399.4	$	215.6	$	43.5	$	4.6	$	663.1
Revenues recognized over time	—		8.9		344.5		77.1		430.5
	$	399.4	$	224.5	$	388.0	$	81.7	$	1,093.6

Our customers are invoiced for products and services at the time of delivery or based on contractual milestones, resulting in outstanding receivables with payment terms from these customers (“Contract Accounts Receivable”). In some cases, the timing of revenue recognition, particularly for revenue recognized over time, differs from when such amounts are invoiced to customers, resulting in a contract asset (revenue recognition precedes the invoicing of the related revenue amount) or a contract liability (payment from the customer precedes recognition of the related revenue amount). Contract assets and liabilities are generally classified as current. On a contract-by-contract basis, the contract assets and contract liabilities are reported net within our condensed consolidated balance sheets. Our contract balances consisted of the following as of September 28, 2019 and December 31, 2018:



Contract Balances	September 28, 2019			December 31, 2018			Change
Contract Accounts Receivable ⁽¹⁾	$	241.8		$	263.9		$	(22.1	)
Contract Assets	68.9			91.2			(22.3		)
Contract Liabilities - current	(85.6		)	(79.5		)	(6.1		)
Contract Liabilities - non-current ⁽²⁾	(2.4		)	(2.1		)	(0.3		)
Net contract balance	$	222.7		$	273.5		$	(50.8	)

_____________________

The $50.8 decrease in our net contract balance from December 31, 2018 to September 28, 2019 was due primarily to cash payments received from customers during the period, partially offset by revenue recognized during the period.

As of September 28, 2019, the aggregate amount allocated to remaining performance obligations was $86.2. We expect to recognize revenue on approximately 60% and 76% of remaining performance obligations over the next 12 and 24 months, respectively, with the remaining recognized thereafter.

Our recorded cumulative revenue associated with the large power projects in South Africa includes amounts of variable consideration related to claims and unapproved change orders. As indicated in Note 15, during February, March, and April of 2019, we received a number of claims from the prime contractors on these projects asserting various amounts of damages. In consideration of these claims (including the magnitude of the claims and claims in areas that had not been previously identified by the prime contractors), and in accordance with ASC 606, we analyzed the risk of a significant revenue reversal associated with the amount of variable consideration noted above. Based on such analysis, we reduced the amount of cumulative revenue associated with the variable consideration on the large power projects in South Africa by $17.5 during the first quarter of 2019, as it was no longer probable that such amounts of revenue would not be reversed.

As indicated in Note 15, on June 28, 2019, our South African subsidiary, DBT, reached an agreement with Alstom S&E Africa (PTY) LTD (“Alstom/GE”), one of the prime contractors on the large power projects in South Africa, to, among other things, settle all material outstanding claims between the parties (other than certain pass-through claims relating to third parties). In connection with the agreement, we reduced the amount of cumulative revenue associated with variable consideration on the large power projects in South Africa by $5.8 during the second quarter of 2019.