v3.7.0.1
Supplementary Information - Condensed Consolidating Financial Information - Cash Flow (Details 2) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities $ 1,790 $ 421
Cash Flows From Investing Activities    
Capital expenditures and investments (966) (1,821)
Working capital changes associated with investing activities (26) (134)
Proceeds from asset dispositions 35 135
Net sales (purchases) of short-term investments (203) (302)
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 57 53
Intercompany cash management 0 0
Other 129 4
Net cash used in continuing investing activities (974) (2,065)
Cash Flows From Financing Activities    
Issuance of debt 0 4,594
Repayment of debt (839) (64)
Issuance of company common stock (46) (42)
Repurchase of company common stock (112) 0
Dividends paid (331) (313)
Other (16) (38)
Net cash provided by (used in) continuing financing activities (1,344) 4,137
Effect of Exchange Rate Changes on Cash and Cash Equivalents 27 5
Net Change in Cash and Cash Equivalents (501) 2,498
Cash and cash equivalents at beginning of period 3,610 2,368
Cash and Cash Equivalents at End of Period 3,109 4,866
Consolidating Adjustments [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities (753) (154)
Cash Flows From Investing Activities    
Capital expenditures and investments 2 199
Working capital changes associated with investing activities 0 0
Proceeds from asset dispositions (29) (2,300)
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 30 51
Collection of advances/loans-related parties (2,144) (2,145)
Intercompany cash management 0 0
Other 0 0
Net cash used in continuing investing activities (2,141) (4,195)
Cash Flows From Financing Activities    
Issuance of debt (30) (51)
Repayment of debt 2,144 2,145
Issuance of company common stock (49) (49)
Repurchase of company common stock 0  
Dividends paid 802 203
Other 27 2,101
Net cash provided by (used in) continuing financing activities 2,894 4,349
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 0 0
Cash and cash equivalents at beginning of period 0 0
Cash and Cash Equivalents at End of Period 0 0
ConocoPhillips [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities (97) (153)
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 2,300
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 0
Intercompany cash management 1,341 (3,438)
Other 0 0
Net cash used in continuing investing activities 1,341 (1,138)
Cash Flows From Financing Activities    
Issuance of debt 0 1,600
Repayment of debt (805) 0
Issuance of company common stock 3 7
Repurchase of company common stock (112)  
Dividends paid (331) (313)
Other 1 (3)
Net cash provided by (used in) continuing financing activities (1,244) 1,291
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 0 0
Cash and cash equivalents at beginning of period 0 0
Cash and Cash Equivalents at End of Period 0 0
ConocoPhillips Company [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities 1,014 (284)
Cash Flows From Investing Activities    
Capital expenditures and investments (149) (504)
Working capital changes associated with investing activities 55 (21)
Proceeds from asset dispositions 46 60
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties (30) (51)
Collection of advances/loans-related parties 63 0
Intercompany cash management 1,037 3,206
Other 0 8
Net cash used in continuing investing activities 1,022 2,698
Cash Flows From Financing Activities    
Issuance of debt 0 2,994
Repayment of debt (2,081) (2,145)
Issuance of company common stock 0 0
Repurchase of company common stock 0  
Dividends paid 0 0
Other 0 (2,320)
Net cash provided by (used in) continuing financing activities (2,081) (1,471)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents (45) 943
Cash and cash equivalents at beginning of period 358 4
Cash and Cash Equivalents at End of Period 313 947
ConocoPhillips Canada Funding Company I [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities 45 1
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
Net sales (purchases) of short-term investments 0 0
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 0 0
Intercompany cash management 0 0
Other 0 0
Net cash used in continuing investing activities 0 0
Cash Flows From Financing Activities    
Issuance of debt 0  
Repayment of debt 0 0
Issuance of company common stock 0 0
Repurchase of company common stock 0  
Dividends paid 0 0
Other 0 0
Net cash provided by (used in) continuing financing activities 0 0
Effect of Exchange Rate Changes on Cash and Cash Equivalents 0 0
Net Change in Cash and Cash Equivalents 45 1
Cash and cash equivalents at beginning of period 13 15
Cash and Cash Equivalents at End of Period 58 16
All Other Subsidiaries [Member]    
Cash Flows From Operating Activities    
Net cash provided by (used in) operating activities 1,581 1,011
Cash Flows From Investing Activities    
Capital expenditures and investments (819) (1,516)
Working capital changes associated with investing activities (81) (113)
Proceeds from asset dispositions 18 75
Net sales (purchases) of short-term investments (203) (302)
Long-term advances/loans-related parties 0 0
Collection of advances/loans-related parties 2,138 2,198
Intercompany cash management (2,378) 232
Other 129 (4)
Net cash used in continuing investing activities (1,196) 570
Cash Flows From Financing Activities    
Issuance of debt 30 51
Repayment of debt (97) (64)
Issuance of company common stock 0 0
Repurchase of company common stock 0  
Dividends paid (802) (203)
Other (44) 184
Net cash provided by (used in) continuing financing activities (913) (32)
Effect of Exchange Rate Changes on Cash and Cash Equivalents 27 5
Net Change in Cash and Cash Equivalents (501) 1,554
Cash and cash equivalents at beginning of period 3,239 2,349
Cash and Cash Equivalents at End of Period $ 2,738 $ 3,903