Revenue

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



	Three Months Ended September 30, 2018
	GMNA		GMI		Corporate		Total Automotive		GM Financial		Eliminations			Total
Vehicle, parts and accessories	$	26,273	$	4,226	$	2	$	30,501	$	—	$	(11	)	$	30,490
Used vehicles	582		23		—		605		—		(1		)	604
Services and other	795		333		54		1,182		—		—			1,182
Automotive net sales and revenue	27,650		4,582		56		32,288		—		(12		)	32,276
Leased vehicle income	—		—		—		—		2,501		—			2,501
Finance charge income	—		—		—		—		917		(2		)	915
Other income	—		—		—		—		100		(1		)	99
GM Financial net sales and revenue	—		—		—		—		3,518		(3		)	3,515
Net sales and revenue	$	27,650	$	4,582	$	56	$	32,288	$	3,518	$	(15	)	$	35,791



	Nine Months Ended September 30, 2018
	GMNA		GMI		Corporate		Total Automotive		GM Financial		Eliminations			Total
Vehicle, parts and accessories	$	79,029	$	13,320	$	12	$	92,361	$	—	$	(36	)	$	92,325
Used vehicles	2,506		138		—		2,644		—		(34		)	2,610
Services and other	2,434		730		143		3,307		—		—			3,307
Automotive net sales and revenue	83,969		14,188		155		98,312		—		(70		)	98,242
Leased vehicle income	—		—		—		—		7,445		—			7,445
Finance charge income	—		—		—		—		2,667		(5		)	2,662
Other income	—		—		—		—		305		(4		)	301
GM Financial net sales and revenue	—		—		—		—		10,417		(9		)	10,408
Net sales and revenue	$	83,969	$	14,188	$	155	$	98,312	$	10,417	$	(79	)	$	108,650

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 in the three and nine months ended September 30, 2018.

Contract liabilities in our Automotive segments consist primarily of maintenance, extended warranty and other service contracts. We recognized revenue of $426 million and $1.2 billion related to contract liabilities during the three and nine months ended September 30, 2018. We expect to recognize revenue of $560 million in the three months ending December 31, 2018 and $1.0 billion, $497 million and $600 million in the years ending December 31, 2019, 2020 and thereafter related to contract liabilities as of September 30, 2018.