Revenue

The following table disaggregates our revenue by major source for revenue generating segments:



	Year Ended December 31, 2018
	GMNA		GMI		Corporate		Total Automotive		GM Financial		Eliminations			Total
Vehicle, parts and accessories	$	107,217	$	17,980	$	20	$	125,217	$	—	$	(62	)	$	125,155
Used vehicles	3,215		175		—		3,390		—		(36		)	3,354
Services and other	3,360		993		183		4,536		—		—			4,536
Automotive net sales and revenue	113,792		19,148		203		133,143		—		(98		)	133,045
Leased vehicle income	—		—		—		—		9,963		—			9,963
Finance charge income	—		—		—		—		3,629		(8		)	3,621
Other income	—		—		—		—		424		(4		)	420
GM Financial net sales and revenue	—		—		—		—		14,016		(12		)	14,004
Net sales and revenue	$	113,792	$	19,148	$	203	$	133,143	$	14,016	$	(110	)	$	147,049

Revenue is measured as the amount of consideration we expect to receive in exchange for transferring goods or providing services. Adjustments to sales incentives for previously recognized sales were insignificant during the year ended December 31, 2018.

Contract liabilities in our Automotive segments consist primarily of maintenance, extended warranty and other service contracts. We recognized revenue of $1.4 billion related to contract liabilities during the year ended December 31, 2018. We expect to recognize revenue of $1.5 billion, $509 million and $626 million in the years ending December 31, 2019, 2020 and thereafter related to contract liabilities as of December 31, 2018.