Changes in Equity (Tables)	3 Months Ended
Changes in Equity (Tables)	Mar. 31, 2021
Stockholders' Equity Note [Abstract]
Schedule of Stockholders Equity [Table Text Block]	Note 7—Changes in Equity The following tables reflect the changes in stockholders' equity: Millions of Dollars Attributable to ConocoPhillips Common Stock Par Value Capital in Excess of Par Treasury Stock Accum. Other Comprehensive Income (Loss) Retained Earnings Non- Controlling Interests Total For the three months ended March 31, 2021 Balances at December 31, 2020 $ 18 47,133 (47,297) (5,218) 35,213 29,849 Net income 982 982 Other comprehensive income 138 138 Dividends paid ($ 0.43 per common share) (588) (588) Acquisition of Concho 3 13,122 13,125 Repurchase of company common stock (375) (375) Distributed under benefit plans 23 23 Other 1 1 Balances at March 31, 2021 $ 21 60,278 (47,672) (5,080) 35,608 43,155 For the three months ended March 31, 2020 Balances at December 31, 2019 $ 18 46,983 (46,405) (5,357) 39,742 69 35,050 Net income (loss) (1,739) 28 (1,711) Other comprehensive loss (788) (788) Dividends paid ($ 0.42 per common share) (458) (458) Repurchase of company common stock (726) (726) Distributions to noncontrolling interests and other (26) (26) Distributed under benefit plans 44 44 Other 1 1 2 Balances at March 31, 2020 $ 18 47,027 (47,130) (6,145) 37,545 72 31,387