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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Statement of Comprehensive Income [Abstract]        
Net Income (Loss) $ 3,094 $ (8,277) $ 4,492 $ (4,696)
Currency translation adjustment 3 7 (16) (12)
Unrealized holding gain (loss) on securities        
Net gain (loss) arising during period 5 (1) 2 (4)
Derivatives        
Net derivatives loss on hedge transactions (2) 0 (2) 0
Total (2) 0 (2) 0
Actuarial gain (loss)        
Amortization to net income of net actuarial loss and settlements 242 169 677 335
Actuarial gain (loss) arising during period 110 0 1,017 0
Prior service credits (cost)        
Amortization to net income of net prior service costs and curtailments (4) (5) (8) (8)
Prior service (costs) credits arising during period 3 0 3 0
Defined benefit plans sponsored by equity affiliates - benefit (cost) 29 7 40 9
Income (taxes) benefit on defined benefit plans (95) (43) (396) (80)
Total 285 128 1,333 256
Other Comprehensive Gain (Loss), Net of Tax 291 134 1,317 240
Comprehensive Income (Loss) 3,385 (8,143) 5,809 (4,456)
Comprehensive loss (income) attributable to noncontrolling interests (12) 7 (33) 25
Comprehensive Income (Loss) Attributable to Chevron Corporation $ 3,373 $ (8,136) $ 5,776 $ (4,431)