Revenue - Summary of Revenue from Contracts with Customers on a Disaggregated Basis (Detail) - USD ($) $ in Millions | 3 Months Ended |
Mar. 31, 2018 | Mar. 31, 2017 |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | $ 1,380 | |
Other operating revenue, includes gains (losses) on commodity derivatives | (34) | |
Total sales and other operating revenues | 1,346 | $ 1,258 |
Exploration and Production | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 1,380 | |
Other operating revenue, includes gains (losses) on commodity derivatives | (34) | |
Total sales and other operating revenues | 1,346 | |
Exploration and Production | United States | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 1,028 | |
Other operating revenue, includes gains (losses) on commodity derivatives | (34) | |
Total sales and other operating revenues | 994 | |
Exploration and Production | Europe | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 36 | |
Total sales and other operating revenues | 36 | |
Exploration and Production | Africa | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 131 | |
Total sales and other operating revenues | 131 | |
Exploration and Production | Asia | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 185 | |
Total sales and other operating revenues | 185 | |
Midstream | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 167 | |
Total sales and other operating revenues | 167 | |
Midstream | Intercompany Revenue | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 167 | |
Crude Oil Revenue | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 768 | |
Crude Oil Revenue | Exploration and Production | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 768 | |
Crude Oil Revenue | Exploration and Production | United States | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 593 | |
Crude Oil Revenue | Exploration and Production | Europe | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 33 | |
Crude Oil Revenue | Exploration and Production | Africa | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 99 | |
Crude Oil Revenue | Exploration and Production | Asia | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 43 | |
Natural Gas Liquids Revenue | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 71 | |
Natural Gas Liquids Revenue | Exploration and Production | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 71 | |
Natural Gas Liquids Revenue | Exploration and Production | United States | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 71 | |
Natural Gas Revenue | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 178 | |
Natural Gas Revenue | Exploration and Production | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 178 | |
Natural Gas Revenue | Exploration and Production | United States | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 39 | |
Natural Gas Revenue | Exploration and Production | Europe | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 3 | |
Natural Gas Revenue | Exploration and Production | Africa | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 8 | |
Natural Gas Revenue | Exploration and Production | Asia | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 128 | |
Revenue from Sale of Third Party Purchased Volumes | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 363 | |
Revenue from Sale of Third Party Purchased Volumes | Exploration and Production | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 363 | |
Revenue from Sale of Third Party Purchased Volumes | Exploration and Production | United States | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 325 | |
Revenue from Sale of Third Party Purchased Volumes | Exploration and Production | Africa | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 24 | |
Revenue from Sale of Third Party Purchased Volumes | Exploration and Production | Asia | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | 14 | |
Eliminations | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | (167) | |
Total sales and other operating revenues | (167) | $ (147) |
Eliminations | Intercompany Revenue | | |
Disaggregation Of Revenue [Line Items] | | |
Total revenues from contracts with customers | $ (167) | |