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Revenue
 6 Months Ended
Jun. 30, 2021
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The following table disaggregates our revenue by major source:
Three Months Ended June 30, 2021
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ReclassificationsTotal
Vehicle, parts and accessories$26,993 $2,475 $2 $29,470 $— $— $— $29,470 
Used vehicles137 13 — 150 — — — 150 
Services and other802 304 19 1,125 25 — (26)1,124 
Automotive net sales and revenue27,932 2,792 21 30,745 25 — (26)30,744 
Leased vehicle income— — — — — 2,304 — 2,304 
Finance charge income— — — — — 1,036 — 1,036 
Other income— — — — — 86 (3)83 
GM Financial net sales and revenue— — — — — 3,426 (3)3,423 
Net sales and revenue$27,932 $2,792 $21 $30,745 $25 $3,426 $(29)$34,167 
Three Months Ended June 30, 2020
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ ReclassificationsTotal
Vehicle, parts and accessories$10,850 $1,439 $— $12,289 $— $— $— $12,289 
Used vehicles122 17 8 147 — — — 147 
Services and other632 221 72 925 28 — (26)927 
Automotive net sales and revenue11,604 1,677 80 13,361 28 — (26)13,363 
Leased vehicle income— — — — — 2,386 — 2,386 
Finance charge income— — — — — 966 — 966 
Other income— — — — — 71 (8)63 
GM Financial net sales and revenue— — — — — 3,423 (8)3,415 
Net sales and revenue$11,604 $1,677 $80 $13,361 $28 $3,423 $(34)$16,778 
Six Months Ended June 30, 2021
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ReclassificationsTotal
Vehicle, parts and accessories$51,913 $5,276 $2 $57,191 $— $— $— $57,191 
Used vehicles365 26 — 391 — — — 391 
Services and other1,611 576 38 2,225 55 — (51)2,229 
Automotive net sales and revenue53,889 5,878 40 59,807 55 — (51)59,811 
Leased vehicle income— — — — — 4,625 — 4,625 
Finance charge income— — — — — 2,052 — 2,052 
Other income— — — — — 156 (3)153 
GM Financial net sales and revenue— — — — — 6,833 (3)6,830 
Net sales and revenue$53,889 $5,878 $40 $59,807 $55 $6,833 $(54)$66,641 
Six Months Ended June 30, 2020
GMNAGMICorporateTotal AutomotiveCruiseGM FinancialEliminations/ ReclassificationsTotal
Vehicle, parts and accessories$35,426 $4,437 $— $39,863 $— $— $— $39,863 
Used vehicles498 42 10 550 — — — 550 
Services and other1,511 478 108 2,097 53 — (50)2,100 
Automotive net sales and revenue37,435 4,957 118 42,510 53 — (50)42,513 
Leased vehicle income— — — — — 4,849 — 4,849 
Finance charge income— — — — — 1,972 (1)1,971 
Other income— — — — — 163 (9)154 
GM Financial net sales and revenue— — — — — 6,984 (10)6,974 
Net sales and revenue$37,435 $4,957 $118 $42,510 $53 $6,984 $(60)$49,487 

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 $350 million and $470 million in the three months ended June 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 June 30, 2021 and December 31, 2020, which are included in Accrued liabilities and Other liabilities. We recognized revenue of $294 million and $689 million related to contract liabilities in the three and six months ended June 30, 2021 and $241 million and $627 million in the three and six months ended June 30, 2020. We expect to recognize revenue of $745 million in the six months ending December 31, 2021 and $738 million, $433 million and $598 million in the years ending December 31, 2022, 2023 and thereafter related to contract liabilities at June 30, 2021.