Revenue

Disaggregated sales disclosures for the quarter ended and year-to-date ended June 30, 2019, and July 1, 2018, are included below and in Note 14, Segmental Information.



	Second Quarter
	2019						2018
In millions	Gas Cylinders		Elektron		Total		Gas Cylinders		Elektron		Total
General industrial	$	11.0	$	28.5	$	39.5	$	13.8	$	32.6	$	46.4
Transportation	24.1		17.2		41.3		19.6		19.7		39.3
Defense and emergency	18.7		12.2		30.9		18.7		14.5		33.2
Healthcare	4.3		0.5		4.8		8.3		1.0		9.3
	$	58.1	$	58.4	$	116.5	$	60.4	$	67.8	$	128.2



	Year-to-date
	2019						2018
In millions	Gas Cylinders		Elektron		Total		Gas Cylinders		Elektron		Total
General industrial	$	24.1	$	59.1	$	83.2	$	26.8	$	61.0	$	87.8
Transportation	45.0		36.3		81.3		36.3		37.1		73.4
Defense and emergency	37.4		22.7		60.1		41.9		28.1		70.0
Healthcare	10.0		2.3		12.3		14.7		2.0		16.7
	$	116.5	$	120.4	$	236.9	$	119.7	$	128.2	$	247.9

The Company’s performance obligations are satisfied over time as work progresses or at a point in time. Design and tooling arrangements are the only contracts for which sales are recognized over time. Sales from these sources combined accounted for less than 3% of the Company’s sales for the quarters ended and year-to-date ended June 30, 2019, and July 1, 2018. All consideration from contracts with customers is included in these amounts.

The following table provides information about contract receivables, contract assets and contract liabilities from contracts with customers:



In millions	June 30, 2019			December 31, 2018
Contract receivables	$	1.7		$	1.5
Contract assets	1.7			2.1
Contract liabilities	$	(0.6	)	$	(1.1	)

Contract assets consist of $1.7 million accrued unbilled amounts relating to tooling revenue and are recognized in prepayments and accrued income in the consolidated balance sheets. Of the $2.1 million contract assets recognized as of December 31, 2018, $1.6 million was billed to customers and transferred to receivables as of June 30, 2019.

Contract liabilities of $0.6 million consist of advance payments and billing above costs incurred and are recognized as other current liabilities. Significant changes in contract liabilities balances during the period are as follows:



In millions	2019
As at January 1,	$	(1.1	)
Payments received / amounts billed	(0.5		)
Costs incurred / revenue recognized	1.0
As at June 30,	$	(0.6	)