v3.20.1
Supplementary Information - Condensed Consolidating Financial Information - Cash Flow (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities $ 2,105 $ 2,894
Cash Flows From Investing Activities    
Capital expenditures and investments (1,649) (1,637)
Working capital changes associated with investing activities 81 107
Proceeds from asset dispositions 549 142
Purchases of Investments (935) (1)
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 66 62
Intercompany cash management 0 0
Other (44) (150)
Net Cash Used in Investing Activities (1,932) (1,477)
Cash Flows From Financing Activities    
Issuance of debt 0 0
Repayment of debt (24) (19)
Issuance of company common stock 2 (38)
Repurchase of company common stock (726) (752)
Dividends paid (458) (350)
Other (24) (14)
Net Cash Provided by (Used in) Financing Activities (1,230) (1,173)
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash (122) 75
Net Change in Cash and Cash Equivalents and Restricted Cash (1,179) 319
Cash and Cash Equivalents and Restricted Cash at beginning of period 5,362 6,151
Cash and Cash Equivalents and Restricted Cash at end of period 4,183 6,470
ConocoPhillips [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities (85) (62)
Cash Flows From Investing Activities    
Capital expenditures and investments 0 0
Working capital changes associated with investing activities 0 0
Proceeds from asset dispositions 0 0
Purchases of Investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 0
Intercompany cash management 1,225 1,163
Other 0 0
Net Cash Used in Investing Activities 1,225 1,163
Cash Flows From Financing Activities    
Issuance of debt 0 0
Repayment of debt 0 0
Issuance of company common stock 43 (1)
Repurchase of company common stock (726) (752)
Dividends paid (458) (350)
Other 1 2
Net Cash Provided by (Used in) Financing Activities (1,140) (1,101)
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash 0 0
Net Change in Cash and Cash Equivalents and Restricted Cash 0 0
Cash and Cash Equivalents and Restricted Cash at beginning of period 0 0
Cash and Cash Equivalents and Restricted Cash at end of period 0 0
Reportable Legal Entities [Member] | ConocoPhillips Company [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities (277) (117)
Cash Flows From Investing Activities    
Capital expenditures and investments (197) (208)
Working capital changes associated with investing activities (9) 18
Proceeds from asset dispositions 140 142
Purchases of Investments (1,207) 0
Long-term advances/loans-related parties (10) (19)
Collection of advances/loans-related parties 71 69
Intercompany cash management (48) 205
Other 0 (150)
Net Cash Used in Investing Activities (1,260) 57
Cash Flows From Financing Activities    
Issuance of debt 0 0
Repayment of debt 0 (20)
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 0
Other 0 0
Net Cash Provided by (Used in) Financing Activities 0 (20)
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash 0 0
Net Change in Cash and Cash Equivalents and Restricted Cash (1,537) (80)
Cash and Cash Equivalents and Restricted Cash at beginning of period 3,443 1,428
Cash and Cash Equivalents and Restricted Cash at end of period 1,906 1,348
Reportable Legal Entities [Member] | Burlington Resources LLC [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities 25 (16)
Cash Flows From Investing Activities    
Capital expenditures and investments (14) 0
Working capital changes associated with investing activities 0 0
Proceeds from asset dispositions 0 0
Purchases of Investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 0
Intercompany cash management (11) 16
Other 0 0
Net Cash Used in Investing Activities (25) 16
Cash Flows From Financing Activities    
Issuance of debt 0 0
Repayment of debt 0 0
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 0
Other 0 0
Net Cash Provided by (Used in) Financing Activities 0 0
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash 0 0
Net Change in Cash and Cash Equivalents and Restricted Cash 0 0
Cash and Cash Equivalents and Restricted Cash at beginning of period 0 0
Cash and Cash Equivalents and Restricted Cash at end of period 0 0
Reportable Legal Entities [Member] | All Other Subsidiaries [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities 2,401 3,448
Cash Flows From Investing Activities    
Capital expenditures and investments (1,452) (1,429)
Working capital changes associated with investing activities 90 89
Proceeds from asset dispositions 409 0
Purchases of Investments 272 (1)
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 66 82
Intercompany cash management (1,166) (1,384)
Other (44) 0
Net Cash Used in Investing Activities (1,825) (2,643)
Cash Flows From Financing Activities    
Issuance of debt 10 19
Repayment of debt (95) (88)
Issuance of company common stock 0 0
Repurchase of company common stock 0 0
Dividends paid 0 (396)
Other (11) (16)
Net Cash Provided by (Used in) Financing Activities (96) (481)
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash (122) 75
Net Change in Cash and Cash Equivalents and Restricted Cash 358 399
Cash and Cash Equivalents and Restricted Cash at beginning of period 1,919 4,723
Cash and Cash Equivalents and Restricted Cash at end of period 2,277 5,122
Consolidating Adjustments [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities 41 (359)
Cash Flows From Investing Activities    
Capital expenditures and investments 14 0
Working capital changes associated with investing activities 0 0
Proceeds from asset dispositions 0 0
Purchases of Investments 0 0
Long-term advances/loans-related parties 10 19
Collection of advances/loans-related parties (71) (89)
Intercompany cash management 0 0
Other 0 0
Net Cash Used in Investing Activities (47) (70)
Cash Flows From Financing Activities    
Issuance of debt (10) (19)
Repayment of debt 71 89
Issuance of company common stock (41) (37)
Repurchase of company common stock 0 0
Dividends paid 0 396
Other (14) 0
Net Cash Provided by (Used in) Financing Activities 6 429
Effect of Exchange Rate Changes on Cash and Cash Equivalents and Restricted Cash 0 0
Net Change in Cash and Cash Equivalents and Restricted Cash 0 0
Cash and Cash Equivalents and Restricted Cash at beginning of period 0 0
Cash and Cash Equivalents and Restricted Cash at end of period $ 0 $ 0