Revenues

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenues

Revenues

Disaggregation of Revenue

The following tables present our Net sales disaggregated by product line and geography.

	Years Ended December 31,
In millions	2021		2020		2019
Performance Materials segment (1)	$	516.8	$	510.0	$	490.6
Performance Chemicals segment
Pavement Technologies product line	195.4		186.8		183.3
Industrial Specialties product line (1)	493.5		391.6		496.9
Engineered Polymers product line	185.8		127.7		122.1
Total	$	874.7	$	706.1	$	802.3
Net sales	$	1,391.5	$	1,216.1	$	1,292.9

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(1) In 2021, we updated disaggregated revenue disclosures, combining certain product groups to reflect categories that depict how the nature, amount, and uncertainty of revenue and cash flows are affected by economic factors. As a result, Automotive Technologies and Process Purification product lines have been combined within the Performance Materials segment. Similarly, the Oilfield Technologies product line has been combined with the Industrial Specialties product line within the Performance Chemicals segment.

The following table presents our Net sales disaggregated by geography, based on the delivery address of our customer.

	Years Ended December 31,
In millions	2021		2020		2019
North America	$	763.3	$	676.9	$	795.7
Asia Pacific	385.5		345.4		281.4
Europe, Middle East, and Africa	219.6		174.9		193.6
South America	23.1		18.9		22.2
Net sales	$	1,391.5	$	1,216.1	$	1,292.9

Contract Balances

The following table provides information about contract assets and contract liabilities from contracts with customers. The contract assets primarily relate to our rights to consideration for products produced but not billed at the reporting date from contracts with certain customers. The contract assets are recognized as accounts receivables when we have an enforceable right to payment for performance completed to date and the customer has been billed. Contract liabilities represent obligations to transfer goods to a customer for which we have received consideration from our customer. For all periods presented, we had no contract liabilities.

	Years Ended December 31,
In millions	2021		2020
Contract asset at beginning of period	$	5.7	$	6.2
Additions	21.5		23.6
Reclassification to accounts receivable, billed to customers	(21.9)		(24.1)
Contract asset at end of period (1)	$	5.3	$	5.7
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(1) Included within "Prepaid and other current assets" on the consolidated balance sheet.