Revenue Revenue

12 Months Ended

Dec. 31, 2020

Revenue from Contract with Customer [Abstract]

Revenue

Revenue

Approximately two-thirds of the Company's net sales are to distributors who then sell directly into our end markets. Within the Utility Solutions segment, our businesses sell to distributors, with the majority of sales to the utility end markets. Our businesses within the Utility Solutions segment also sell directly into transmission and distribution utility markets.

The following table presents disaggregated revenue by business group:

	Twelve Months Ended December 31,
in millions	2020		2019		2018
Net sales
Commercial and Industrial	$	762.1	$	902.1	$	910.8
Construction and Energy	715.4		808.7		799.7
Lighting	786.1		914.9		950.1
Total Electrical Solutions	$	2,263.6	$	2,625.7	$	2,660.6
Power Systems	1,343.0		1,283.1		1,210.0
Aclara	579.4		682.2		611.1
Total Utility Solutions	$	1,922.4	$	1,965.3	$	1,821.1
TOTAL	$	4,186.0	$	4,591.0	$	4,481.7

The following table presents disaggregated third-party net sales by geographic location (on a geographic basis, the Company defines "international" as operations based outside of the United States and its possessions):

	Twelve Months Ended December 31,
in millions	2020		2019		2018
Net sales
United States	$	2,049.5	$	2,358.2	$	2,365.4
International	214.1		267.5		295.2
Total Electrical Solutions	$	2,263.6	$	2,625.7	$	2,660.6
United States	1,810.9		1,832.3		1,675.2
International	111.5		133.0		145.9
Total Utility Solutions	$	1,922.4	$	1,965.3	$	1,821.1
TOTAL	$	4,186.0	$	4,591.0	$	4,481.7

Contract Balances

Our contract liabilities consist of advance payments for products as well as deferred revenue on service obligations and extended warranties. The current portion of deferred revenue is included in Other accrued liabilities and the non-current portion of deferred revenue is included in Other non-current liabilities in the Consolidated Balance Sheet.

Contract liabilities were $30.9 million as of December 31, 2020 compared to $31.0 million as of December 31, 2019. The $0.1 million decrease in our contract liabilities balance was primarily due to the recognition of $19.7 million in revenue related to amounts that were recorded in contract liabilities at January 1, 2020, partially offset by a $19.6 million net increase in current year deferrals primarily due to timing of advance payments on certain orders. Impairment losses recognized on our receivables and contract assets were immaterial in the twelve months ended December 31, 2020. See Note 1 – Significant Accounting Policies in the Notes to Consolidated Financial Statements for additional information.

Unsatisfied Performance Obligations

The Company has elected the practical expedient to disclose only the value of unsatisfied performance obligations for contracts with an original expected length greater than one year. Prior to the acquisition of Aclara, the majority of Hubbell's revenues resulted from sales of inventoried products with short periods of manufacture and delivery and thus are excluded from this disclosure. As of December 31, 2020, the Company had approximately $305 million of unsatisfied performance obligations for contracts with an original expected length of greater than one year, primarily relating to long-term contracts of the Aclara business (within the Utility Solutions segment) to deliver and install meters, metering communications and grid monitoring sensor technology. The Company expects that a majority of the unsatisfied performance obligations will be completed and recognized over the next 3 years.