Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2022

Revenue From Contract With Customer [Abstract]

Revenue from Contracts with Customers

2) Revenue from Contracts with Customers

Contract assets as of March 31, 2022 and December 31, 2021 were immaterial. A roll-forward of the Company's deferred revenue and customer advances is as follows:

	Three Months Ended
	March 31, 2022			March 31, 2021
Beginning balance, January 1(1)	$	40		$	37
Additions to deferred revenue and customer advances		68			25
Amount of deferred revenue and customer advances recognized in income		(60	)		(22	)
Ending balance, March 31(2)	$	48		$	40

(1)Beginning deferred revenue and customer advances as of January 1, 2022 included $16 of current deferred revenue, $3 of long-term deferred revenue and $21 of current customer advances. Beginning deferred revenue and customer advances as of January 1, 2021 included $18 of current deferred revenue, $6 of long-term deferred revenue and $13 of current customer advances.

(2)Ending deferred revenue and customer advances as of March 31, 2022 included $17 of current deferred revenue, $2 of long-term deferred revenue and $29 of current customer advances. Ending deferred revenue and customer advances as of March 31, 2021 included $17 of current deferred revenue, $5 of long-term deferred revenue and $18 of current customer advances.

Disaggregation of Revenue

The following table summarizes revenue from contracts with customers:

	Three Months Ended March 31, 2022
	VSD		PSD		ESD		Total
Net revenues:
Products	$	416	$	210	$	22	$	648
Services		58		18		18		94
Total net revenues	$	474	$	228	$	40	$	742

	Three Months Ended March 31, 2021
	VSD		PSD		ESD		Total
Net revenues:
Products	$	379	$	165	$	61	$	605
Services		57		17		15		89
Total net revenues	$	436	$	182	$	76	$	694

Product revenue, excluding revenue from certain custom products, is recorded at a point in time, while the majority of service revenue and revenue from certain custom products is recorded over time.