Income Taxes - Out of Period Adjustment (Detail) - USD ($) $ in Millions |
3 Months Ended | |||
---|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2018 |
Oct. 01, 2018 |
|
Error Corrections and Prior Period Adjustments Restatement [Line Items] | ||||
Provision for income taxes | $ 104 | $ 22 | ||
Goodwill | 20,229 | $ 20,184 | ||
Andeavor | ||||
Error Corrections and Prior Period Adjustments Restatement [Line Items] | ||||
Goodwill | $ 16,380 | |||
Andeavor | Adjustments | ||||
Error Corrections and Prior Period Adjustments Restatement [Line Items] | ||||
Provision for income taxes | 36 | |||
Deferred tax liabilities | 68 | |||
Goodwill | $ 32 | $ 66 |