Supplementary Information - Condensed Consolidating Financial Information Cash Flow (Details) - USD ($) $ in Millions |
12 Months Ended |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Cash Flows From Operating Activities |
|
|
|
|
|
|
| Net Cash Provided by (Used in) Operating Activities |
|
$ 11,104
|
|
$ 12,934
|
|
$ 7,077
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
(6,636)
|
|
(6,750)
|
|
(4,591)
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
(103)
|
|
(68)
|
|
132
|
| Proceeds from asset dispositions |
|
3,012
|
|
1,082
|
|
13,860
|
| Net Sales (Purchases) of Investments |
|
(2,910)
|
|
1,620
|
|
(1,790)
|
| Long-term advances/loans-related parties |
|
0
|
|
0
|
|
0
|
| Collection of advances/loans-related parties |
|
127
|
|
119
|
|
115
|
| Intercompany Cash Management |
|
0
|
|
0
|
|
0
|
| Other |
|
(108)
|
|
154
|
|
36
|
| Net Cash Provided by (Used in) Investing Activities |
|
(6,618)
|
|
(3,843)
|
|
7,762
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Issuance of debt |
|
0
|
|
0
|
|
0
|
| Repayment of debt |
|
(80)
|
|
(4,995)
|
|
(7,876)
|
| Issuance of company common stock |
|
(30)
|
|
121
|
|
(63)
|
| Repurchase of company common stock |
|
(3,500)
|
|
(2,999)
|
|
(3,000)
|
| Dividends paid |
|
(1,500)
|
|
(1,363)
|
|
(1,305)
|
| Other |
|
(119)
|
|
(123)
|
|
(112)
|
| Net Cash Provided by (Used in) Financing Activities |
|
(5,229)
|
|
(9,359)
|
|
(12,356)
|
| Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash |
|
(46)
|
|
(117)
|
|
232
|
| Net Change in Cash and Cash Equivalents and Restricted Cash |
|
(789)
|
|
(385)
|
|
2,715
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
6,151
|
[1] |
6,325
|
[1] |
3,610
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
[1] |
5,362
|
|
6,151
|
|
6,325
|
| Restatement Adjustment [Member] |
|
|
|
|
|
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
|
|
6,536
|
|
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
|
|
|
|
6,536
|
| ConocoPhillips [Member] |
|
|
|
|
|
|
| Cash Flows From Operating Activities |
|
|
|
|
|
|
| Net Cash Provided by (Used in) Operating Activities |
|
1,457
|
|
860
|
|
71
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
|
|
0
|
|
0
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
|
|
0
|
|
0
|
| Proceeds from asset dispositions |
|
2,374
|
|
3,457
|
|
7,765
|
| Net Sales (Purchases) of Investments |
|
0
|
|
0
|
|
0
|
| Long-term advances/loans-related parties |
|
0
|
|
0
|
|
0
|
| Collection of advances/loans-related parties |
|
0
|
|
589
|
|
658
|
| Intercompany Cash Management |
|
1,060
|
|
(803)
|
|
1,151
|
| Other |
|
0
|
|
0
|
|
0
|
| Net Cash Provided by (Used in) Investing Activities |
|
3,434
|
|
3,243
|
|
9,574
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Issuance of debt |
|
0
|
|
0
|
|
0
|
| Repayment of debt |
|
0
|
|
0
|
|
(5,459)
|
| Issuance of company common stock |
|
105
|
|
254
|
|
115
|
| Repurchase of company common stock |
|
(3,500)
|
|
(2,999)
|
|
(3,000)
|
| Dividends paid |
|
(1,500)
|
|
(1,363)
|
|
(1,305)
|
| Other |
|
4
|
|
5
|
|
4
|
| Net Cash Provided by (Used in) Financing Activities |
|
(4,891)
|
|
(4,103)
|
|
(9,645)
|
| Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash |
|
0
|
|
0
|
|
0
|
| Net Change in Cash and Cash Equivalents and Restricted Cash |
|
0
|
|
0
|
|
0
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
0
|
|
0
|
|
0
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
0
|
|
0
|
|
0
|
| ConocoPhillips [Member] | Restatement Adjustment [Member] |
|
|
|
|
|
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
0
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
|
|
0
|
|
|
| ConocoPhillips Company [Member] |
|
|
|
|
|
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Collection of advances/loans-related parties |
|
|
|
|
|
200
|
| Reportable Legal Entities [Member] | ConocoPhillips [Member] |
|
|
|
|
|
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
0
|
|
|
|
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
0
|
|
|
|
|
| Reportable Legal Entities [Member] | ConocoPhillips Company [Member] |
|
|
|
|
|
|
| Cash Flows From Operating Activities |
|
|
|
|
|
|
| Net Cash Provided by (Used in) Operating Activities |
|
7,986
|
|
4,019
|
|
1,183
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
(2,517)
|
|
(980)
|
|
(1,663)
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
37
|
|
(110)
|
|
194
|
| Proceeds from asset dispositions |
|
7,047
|
|
666
|
|
11,146
|
| Net Sales (Purchases) of Investments |
|
(2,803)
|
|
0
|
|
0
|
| Long-term advances/loans-related parties |
|
(812)
|
|
(126)
|
|
(214)
|
| Collection of advances/loans-related parties |
|
141
|
|
3,432
|
|
1,527
|
| Intercompany Cash Management |
|
(2,849)
|
|
3,504
|
|
101
|
| Other |
|
(149)
|
|
151
|
|
(8)
|
| Net Cash Provided by (Used in) Investing Activities |
|
(1,905)
|
|
6,537
|
|
11,083
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Issuance of debt |
|
0
|
|
10
|
|
20
|
| Repayment of debt |
|
(21)
|
|
(4,865)
|
|
(4,411)
|
| Issuance of company common stock |
|
0
|
|
0
|
|
0
|
| Repurchase of company common stock |
|
0
|
|
0
|
|
0
|
| Dividends paid |
|
(4,034)
|
|
(1,043)
|
|
(235)
|
| Other |
|
0
|
|
(3,468)
|
|
(7,765)
|
| Net Cash Provided by (Used in) Financing Activities |
|
(4,055)
|
|
(9,366)
|
|
(12,391)
|
| Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash |
|
(11)
|
|
4
|
|
1
|
| Net Change in Cash and Cash Equivalents and Restricted Cash |
|
2,015
|
|
1,194
|
|
(124)
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
1,428
|
|
234
|
|
358
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
3,443
|
|
1,428
|
|
234
|
| Reportable Legal Entities [Member] | ConocoPhillips Company [Member] | Restatement Adjustment [Member] |
|
|
|
|
|
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
1,428
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
|
|
1,428
|
|
|
| Reportable Legal Entities [Member] | Burlington Resources LLC [Member] |
|
|
|
|
|
|
| Cash Flows From Operating Activities |
|
|
|
|
|
|
| Net Cash Provided by (Used in) Operating Activities |
|
3,207
|
|
838
|
|
2,971
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
0
|
|
(603)
|
|
(4,351)
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
0
|
|
0
|
|
0
|
| Proceeds from asset dispositions |
|
769
|
|
1,926
|
|
12,178
|
| Net Sales (Purchases) of Investments |
|
0
|
|
0
|
|
0
|
| Long-term advances/loans-related parties |
|
0
|
|
(173)
|
|
(65)
|
| Collection of advances/loans-related parties |
|
0
|
|
212
|
|
389
|
| Intercompany Cash Management |
|
1,402
|
|
(2,150)
|
|
(1,341)
|
| Other |
|
0
|
|
0
|
|
0
|
| Net Cash Provided by (Used in) Investing Activities |
|
2,171
|
|
(788)
|
|
6,810
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Issuance of debt |
|
0
|
|
0
|
|
0
|
| Repayment of debt |
|
0
|
|
(53)
|
|
0
|
| Issuance of company common stock |
|
0
|
|
0
|
|
0
|
| Repurchase of company common stock |
|
0
|
|
0
|
|
0
|
| Dividends paid |
|
(454)
|
|
0
|
|
0
|
| Other |
|
(4,924)
|
|
0
|
|
(9,781)
|
| Net Cash Provided by (Used in) Financing Activities |
|
(5,378)
|
|
(53)
|
|
(9,781)
|
| Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash |
|
0
|
|
0
|
|
(2)
|
| Net Change in Cash and Cash Equivalents and Restricted Cash |
|
0
|
|
(3)
|
|
(2)
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
0
|
|
3
|
|
5
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
0
|
|
0
|
|
3
|
| Reportable Legal Entities [Member] | Burlington Resources LLC [Member] | Restatement Adjustment [Member] |
|
|
|
|
|
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
0
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
|
|
0
|
|
|
| Reportable Legal Entities [Member] | All Other Subsidiaries [Member] |
|
|
|
|
|
|
| Cash Flows From Operating Activities |
|
|
|
|
|
|
| Net Cash Provided by (Used in) Operating Activities |
|
9,803
|
|
14,132
|
|
5,904
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
(5,714)
|
|
(5,777)
|
|
(3,795)
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
(140)
|
|
42
|
|
(62)
|
| Proceeds from asset dispositions |
|
1,055
|
|
705
|
|
12,796
|
| Net Sales (Purchases) of Investments |
|
(107)
|
|
1,620
|
|
(1,790)
|
| Long-term advances/loans-related parties |
|
0
|
|
(10)
|
|
(20)
|
| Collection of advances/loans-related parties |
|
147
|
|
129
|
|
2,196
|
| Intercompany Cash Management |
|
387
|
|
(551)
|
|
89
|
| Other |
|
41
|
|
3
|
|
44
|
| Net Cash Provided by (Used in) Investing Activities |
|
(4,331)
|
|
(3,839)
|
|
9,458
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Issuance of debt |
|
812
|
|
299
|
|
279
|
| Repayment of debt |
|
(220)
|
|
(4,320)
|
|
(2,661)
|
| Issuance of company common stock |
|
0
|
|
0
|
|
0
|
| Repurchase of company common stock |
|
0
|
|
0
|
|
0
|
| Dividends paid |
|
(7,097)
|
|
(6,057)
|
|
(2,995)
|
| Other |
|
(1,736)
|
|
(1,670)
|
|
(7,377)
|
| Net Cash Provided by (Used in) Financing Activities |
|
(8,241)
|
|
(11,748)
|
|
(12,754)
|
| Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash |
|
(35)
|
|
(121)
|
|
233
|
| Net Change in Cash and Cash Equivalents and Restricted Cash |
|
(2,804)
|
|
(1,576)
|
|
2,841
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
4,723
|
|
6,088
|
|
3,247
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
1,919
|
|
4,723
|
|
6,088
|
| Reportable Legal Entities [Member] | All Other Subsidiaries [Member] | Restatement Adjustment [Member] |
|
|
|
|
|
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
4,723
|
|
6,299
|
|
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
|
|
4,723
|
|
6,299
|
| Consolidation, Eliminations [Member] |
|
|
|
|
|
|
| Cash Flows From Operating Activities |
|
|
|
|
|
|
| Net Cash Provided by (Used in) Operating Activities |
|
(11,349)
|
|
(6,915)
|
|
(3,052)
|
| Cash Flows From Investing Activities |
|
|
|
|
|
|
| Capital expenditures and investments |
|
1,595
|
|
610
|
|
5,218
|
| Increase (Decrease) In Capital Accrual Associated With Investing Activities |
|
0
|
|
0
|
|
0
|
| Proceeds from asset dispositions |
|
(8,233)
|
|
(5,672)
|
|
(30,025)
|
| Net Sales (Purchases) of Investments |
|
0
|
|
0
|
|
0
|
| Long-term advances/loans-related parties |
|
812
|
|
309
|
|
299
|
| Collection of advances/loans-related parties |
|
(161)
|
|
(4,243)
|
|
(4,655)
|
| Intercompany Cash Management |
|
0
|
|
0
|
|
0
|
| Other |
|
0
|
|
0
|
|
0
|
| Net Cash Provided by (Used in) Investing Activities |
|
(5,987)
|
|
(8,996)
|
|
(29,163)
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Issuance of debt |
|
(812)
|
|
(309)
|
|
(299)
|
| Repayment of debt |
|
161
|
|
4,243
|
|
4,655
|
| Issuance of company common stock |
|
(135)
|
|
(133)
|
|
(178)
|
| Repurchase of company common stock |
|
0
|
|
0
|
|
0
|
| Dividends paid |
|
11,585
|
|
7,100
|
|
3,230
|
| Other |
|
6,537
|
|
5,010
|
|
24,807
|
| Net Cash Provided by (Used in) Financing Activities |
|
17,336
|
|
15,911
|
|
32,215
|
| Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash |
|
0
|
|
0
|
|
0
|
| Net Change in Cash and Cash Equivalents and Restricted Cash |
|
0
|
|
0
|
|
0
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
0
|
|
0
|
|
0
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
0
|
|
0
|
|
$ 0
|
| Consolidation, Eliminations [Member] | Restatement Adjustment [Member] |
|
|
|
|
|
|
| Cash Flows From Financing Activities |
|
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at beginning of period |
|
$ 0
|
|
|
|
|
| Cash and Cash Equivalents and Restricted Cash at end of period |
|
|
|
$ 0
|
|
|
|
|