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Revenue
 12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The following table disaggregates our revenue by major source for revenue generating segments:
Year Ended December 31, 2020
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ ReclassificationsTotal
Vehicle, parts and accessories$92,749 $10,593 $1 $103,343 $— $— $— $103,343 
Used vehicles875 115 20 1,010 — — — 1,010 
Services and other3,109 878 329 4,316 103 — (99)4,320 
Automotive net sales and revenue96,733 11,586 350 108,669 103 — (99)108,673 
Leased vehicle income— — — — — 9,530 — 9,530 
Finance charge income— — — — — 3,996 (1)3,995 
Other income— — — — — 305 (18)287 
GM Financial net sales and revenue— — — — — 13,831 (19)13,812 
Net sales and revenue$96,733 $11,586 $350 $108,669 $103 $13,831 $(118)$122,485 

Year Ended December 31, 2019
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ ReclassificationsTotal
Vehicle, parts and accessories$101,346 $14,931 $— $116,277 $— $— $— $116,277 
Used vehicles1,896 123 — 2,019 — — — 2,019 
Services and other3,124 1,057 220 4,401 100 — (100)4,401 
Automotive net sales and revenue106,366 16,111 220 122,697 100 — (100)122,697 
Leased vehicle income— — — — — 10,032 — 10,032 
Finance charge income— — — — — 4,071 (7)4,064 
Other income— — — — — 451 (7)444 
GM Financial net sales and revenue— — — — — 14,554 (14)14,540 
Net sales and revenue$106,366 $16,111 $220 $122,697 $100 $14,554 $(114)$137,237 
Year Ended December 31, 2018
GMNAGMICorporateTotal AutomotiveGM FinancialEliminationsTotal
Vehicle, parts and accessories$107,217 $17,980 $20 $125,217 $— $(62)$125,155 
Used vehicles3,215 175 — 3,390 — (36)3,354 
Services and other3,360 993 183 4,536 — — 4,536 
Automotive net sales and revenue113,792 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 years ended December 31, 2020, 2019 and 2018.
Contract liabilities in our Automotive segments primarily consist of maintenance, extended warranty and other service contracts of $2.4 billion and $2.2 billion at December 31, 2020 and 2019, which are included in Accrued liabilities and Other liabilities. We recognized revenue of $1.1 billion and $1.5 billion related to contract liabilities during the years ended December 31, 2020 and 2019. We expect to recognize revenue of $1.2 billion, $503 million and $759 million in the years ending December 31, 2021, 2022 and thereafter related to contract liabilities at December 31, 2020.