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Revenue
 9 Months Ended
Sep. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The following table disaggregates our revenue by major source:
Three Months Ended September 30, 2021
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ReclassificationsTotal
Vehicle, parts and accessories$19,633 $2,548 $6 $22,187 $— $— $— $22,187 
Used vehicles115 14 — 129 — — — 129 
Services and other806 281 21 1,108 26 — (24)1,110 
Automotive net sales and revenue20,554 2,843 27 23,424 26 — (24)23,426 
Leased vehicle income— — — — — 2,246 — 2,246 
Finance charge income— — — — — 1,035 — 1,035 
Other income— — — — — 73 (1)72 
GM Financial net sales and revenue— — — — — 3,354 (1)3,353 
Net sales and revenue$20,554 $2,843 $27 $23,424 $26 $3,354 $(25)$26,779 
Three Months Ended September 30, 2020
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ ReclassificationsTotal
Vehicle, parts and accessories$28,143 $2,513 $— $30,656 $— $— $— $30,656 
Used vehicles185 23 6 214 — — — 214 
Services and other800 199 197 1,196 26 — (25)1,197 
Automotive net sales and revenue29,128 2,735 203 32,066 26 — (25)32,067 
Leased vehicle income— — — — — 2,354 — 2,354 
Finance charge income— — — — — 999 — 999 
Other income— — — — — 68 (8)60 
GM Financial net sales and revenue— — — — — 3,421 (8)3,413 
Net sales and revenue$29,128 $2,735 $203 $32,066 $26 $3,421 $(33)$35,480 
Nine Months Ended September 30, 2021
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ReclassificationsTotal
Vehicle, parts and accessories$71,546 $7,825 $8 $79,379 $— $— $— $79,379 
Used vehicles480 40 — 520 — — — 520 
Services and other2,417 856 59 3,332 81 — (75)3,338 
Automotive net sales and revenue74,443 8,721 67 83,231 81 — (75)83,237 
Leased vehicle income— — — — — 6,871 — 6,871 
Finance charge income— — — — — 3,087 — 3,087 
Other income— — — — — 229 (4)225 
GM Financial net sales and revenue— — — — — 10,187 (4)10,183 
Net sales and revenue$74,443 $8,721 $67 $83,231 $81 $10,187 $(79)$93,420 
Nine Months Ended September 30, 2020
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ ReclassificationsTotal
Vehicle, parts and accessories$63,569 $6,950 $— $70,519 $— $— $— $70,519 
Used vehicles683 65 16 764 — — — 764 
Services and other2,311 677 305 3,293 79 — (75)3,297 
Automotive net sales and revenue66,563 7,692 321 74,576 79 — (75)74,580 
Leased vehicle income— — — — — 7,203 — 7,203 
Finance charge income— — — — — 2,971 (1)2,970 
Other income— — — — — 231 (17)214 
GM Financial net sales and revenue— — — — — 10,405 (18)10,387 
Net sales and revenue$66,563 $7,692 $321 $74,576 $79 $10,405 $(93)$84,967 

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 increased revenue by $290 million and $340 million in the three months ended September 30, 2021 and 2020.
Contract liabilities in our Automotive segments primarily consist of maintenance, extended warranty and other service contracts of $2.5 billion and $2.4 billion at September 30, 2021 and December 31, 2020, which are included in Accrued liabilities and Other liabilities. We recognized revenue of $262 million and $951 million related to contract liabilities in the three and nine months ended September 30, 2021 and $245 million and $872 million in the three and nine months ended September 30, 2020. We expect to recognize revenue of $459 million in the three months ending December 31, 2021 and $844 million, $469 million and $725 million in the years ending December 31, 2022, 2023 and thereafter related to contract liabilities at September 30, 2021.