XML 110 R82.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Debt - Schedule of Debt (Details) - USD ($) $ in Millions | Dec. 31, 2023 | May 25, 2023 | Dec. 31, 2022 | Mar. 31, 2022
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Finance leases | $ 1,129 |  | $ 1,320 |
Net unamortized premiums, discounts and debt issuance costs | (605) |  | (532) |
Total debt | 18,937 |  | 16,643 |
Short-term debt | (1,074) |  | (417) |
Long-term debt | 17,863 |  | 16,226 |
Debt at face value | 18,413 |  | 15,855 |
Variable Rate Debt Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt at face value | $ 283 |  | 283 |
7.65% Debentures due 2023 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.65% |  |  |
7.65% Debentures due 2023 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.65% |  |  |
Long-term and short-term, combined amount, gross | $ 0 |  | 78 |
2.125% Notes due 2024 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 2.125% | 2.125% |  | 2.125%
Long-term and short-term, combined amount, gross | $ 461 |  | 900 |
Debt at face value |  | $ 900 |  | $ 900
3.35% Notes due 2024 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 3.35% | 3.35% |  |
Long-term and short-term, combined amount, gross | $ 265 |  | 426 |
Debt at face value |  | $ 426 |  |
2.4% Notes due 2025 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 2.40% | 2.40% |  | 2.40%
Long-term and short-term, combined amount, gross | $ 366 |  | 900 |
Debt at face value |  | $ 900 |  | $ 900
8.2% Notes due 2025 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 8.20% |  |  |
Long-term and short-term, combined amount, gross | $ 134 |  | 134 |
3.35% Debentures due 2025 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 3.35% |  |  |
Long-term and short-term, combined amount, gross | $ 199 |  | 199 |
6.875% Debentures due 2026 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 6.875% |  |  |
Long-term and short-term, combined amount, gross | $ 67 |  | 67 |
7.8% Debentures due 2027 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.80% |  |  |
Long-term and short-term, combined amount, gross | $ 203 |  | 203 |
3.75% Notes due 2027 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 3.75% |  |  | 3.75%
Long-term and short-term, combined amount, gross | $ 196 |  | 196 |
Debt at face value |  |  |  | $ 1,000
4.3% Notes due 2028 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.30% |  |  | 4.30%
Long-term and short-term, combined amount, gross | $ 223 |  | 223 |
Debt at face value |  |  |  | $ 1,000
7.375% Debentures due 2029 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.375% |  |  |
Long-term and short-term, combined amount, gross | $ 92 |  | 92 |
7.0% Debentures due 2029 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.00% |  |  | 7.00%
Long-term and short-term, combined amount, gross | $ 112 |  | 112 |
Debt at face value |  |  |  | $ 200
6.95% Notes due 2029 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 6.95% |  |  | 6.95%
Long-term and short-term, combined amount, gross | $ 1,195 |  | 1,195 |
Debt at face value |  |  |  | $ 1,549
8.125% Notes due 2030 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 8.125% |  |  |
Long-term and short-term, combined amount, gross | $ 390 |  | 390 |
2.4% Notes due 2031 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 2.40% |  |  | 2.40%
Long-term and short-term, combined amount, gross | $ 227 |  | 227 |
Debt at face value |  |  |  | $ 500
7.2% Notes due 2031 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.20% |  |  | 7.20%
Long-term and short-term, combined amount, gross | $ 447 |  | 447 |
Debt at face value |  |  |  | $ 575
7.25% Notes due 2031 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.25% |  |  | 7.25%
Long-term and short-term, combined amount, gross | $ 400 |  | 400 |
Debt at face value |  |  |  | $ 500
7.4% Notes due 2031 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.40% |  |  | 7.40%
Long-term and short-term, combined amount, gross | $ 382 |  | 382 |
Debt at face value |  |  |  | $ 500
5.9% Notes due 2032 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.90% |  |  |
Long-term and short-term, combined amount, gross | $ 505 |  | 505 |
5.05% Notes due 2033 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.05% |  |  |
Long-term and short-term, combined amount, gross | $ 1,000 |  | 0 |
4.15% Notes due 2034 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.15% |  |  |
Long-term and short-term, combined amount, gross | $ 246 |  | 246 |
5.95% Notes due 2036 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.95% |  |  | 5.95%
Long-term and short-term, combined amount, gross | $ 326 |  | 326 |
Debt at face value |  |  |  | $ 500
5.951% Notes serially maturing 2022 through 2037 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.951% |  |  |
Long-term and short-term, combined amount, gross | $ 603 |  | 631 |
5.9% Notes due 2038 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.90% |  |  | 5.90%
Long-term and short-term, combined amount, gross | $ 350 |  | 350 |
Debt at face value |  |  |  | $ 600
6.5% Notes due 2039 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 6.50% |  |  | 6.50%
Long-term and short-term, combined amount, gross | $ 1,588 |  | 1,588 |
Debt at face value |  |  |  | $ 2,750
3.758% Notes due 2042 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 3.758% |  |  | 3.758%
Long-term and short-term, combined amount, gross | $ 785 |  | 785 |
Debt at face value |  |  |  | $ 785
4.3% Notes due 2044 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.30% |  |  |
Long-term and short-term, combined amount, gross | $ 750 |  | 750 |
5.95% Notes due 2046 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.95% |  |  | 5.95%
Long-term and short-term, combined amount, gross | $ 329 |  | 329 |
Debt at face value |  |  |  | $ 500
7.9% Debentures due 2047 | Debentures |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 7.90% |  |  |
Long-term and short-term, combined amount, gross | $ 60 |  | 60 |
4.875% Notes due 2047 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.875% |  |  | 4.875%
Long-term and short-term, combined amount, gross | $ 319 |  | 319 |
Debt at face value |  |  |  | $ 800
4.85% Notes due 2048 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.85% |  |  | 4.85%
Long-term and short-term, combined amount, gross | $ 219 |  | 219 |
Debt at face value |  |  |  | $ 600
3.8% Notes due 2052 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 3.80% |  |  | 3.80%
Long-term and short-term, combined amount, gross | $ 1,100 |  | 1,100 |
Debt at face value |  |  |  | $ 1,100
5.3% Notes due 2053 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.30% |  |  |
Long-term and short-term, combined amount, gross | $ 1,100 |  | 0 |
5.55% Notes due 2054 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.55% |  |  |
Long-term and short-term, combined amount, gross | $ 1,000 |  | 0 |
4.025% Notes due 2062 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.025% |  |  | 4.025%
Long-term and short-term, combined amount, gross | $ 1,770 |  | 1,770 |
Debt at face value |  |  |  | $ 1,770
5.70% Notes due 2063 | Notes Payable to Banks |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 5.70% |  |  |
Long-term and short-term, combined amount, gross | $ 700 |  | 0 |
Marine Terminal Revenue Refunding Bonds due 2031 at 1.65% – 4.70% during 2023 and 0.07% – 4.10% during 2022 | Variable Rate Debt Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term and short-term, combined amount, gross | $ 265 |  | $ 265 |
Marine Terminal Revenue Refunding Bonds due 2031 at 1.65% – 4.70% during 2023 and 0.07% – 4.10% during 2022 | Variable Rate Debt Bonds | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 1.65% |  | 0.07% |
Marine Terminal Revenue Refunding Bonds due 2031 at 1.65% – 4.70% during 2023 and 0.07% – 4.10% during 2022 | Variable Rate Debt Bonds | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.70% |  | 4.10% |
Industrial Development Bonds due 2035 at 1.85% – 4.70% during 2023 and 0.07% – 4.10% during 2022 | Variable Rate Debt Bonds |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term and short-term, combined amount, gross | $ 18 |  | $ 18 |
Industrial Development Bonds due 2035 at 1.85% – 4.70% during 2023 and 0.07% – 4.10% during 2022 | Variable Rate Debt Bonds | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 1.85% |  | 0.07% |
Industrial Development Bonds due 2035 at 1.85% – 4.70% during 2023 and 0.07% – 4.10% during 2022 | Variable Rate Debt Bonds | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Stated interest rate | 4.70% |  | 4.10% |
Other |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term and short-term, combined amount, gross | $ 21 |  | $ 23 |

X
- Definition Debt, Long-Term and Short-Term, Combined Amount, Gross + References No definition available. + Details
Name: | cop_DebtLongTermAndShortTermCombinedAmountGross
Namespace Prefix: | cop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of debt and lease obligation, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(21)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_DebtCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482900/835-30-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69E Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org//1943274/2147481568/470-20-55-69F Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1F Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1I + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt discount (premium). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-1A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-4 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482925/835-30-45-3 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482949/835-30-55-8 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-1 + Details
Name: | us-gaap_FinanceLeaseLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and lease obligation, classified as noncurrent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
Name: | us-gaap_LongTermDebtAndCapitalLeaseObligations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of long-term debt and lease obligation, including portion classified as current. + References No definition available. + Details
Name: | us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=cop_VariableRateDebtBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A765DebenturesDue2023Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_NotesPayableToBanksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A2125NoteDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A335NotesDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A24NoteDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A82NotesDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A335DebenturesDue2025Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A6875DebenturesDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A78DebenturesDue2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A375NotesDue2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A43NotesDue2028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A7375DebenturesDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A7DebenturesDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A695NotesDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A8125NotesDue2030Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A24NotesDue2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A72NotesDue2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A725NotesDue2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A74NotesDue2031Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A59NotesDue2032Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A505NotesDue2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A415NotesDue2034Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A595NotesDue2036Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A5.951NotesDue2022Through2037Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A59NotesDue2038Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A65NotesDue2039Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A3758NoteDue2042Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A43NotesDue2044Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A595NotesDue2046Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A79DebenturesDue2047Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A4875NotesDue2047Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A485NotesDue2048TwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A38NoteDue2052Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A5300NotesDue2053Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A5550NotesDue2054Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A4025NoteDue2062Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_A570NotesDue2063Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_MarineTerminalRevenueRefundingBondsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_IndustrialDevelopmentBondsDue2035Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=cop_OtherDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |