Details to the consolidated statements of cash flows (Details 2) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Statement [line items] | ||||
| Income taxes paid (refund) | $ 391 | $ 560 | $ 987 | $ 998 |
| Income taxes paid (refund), classified as operating activities | 303 | 560 | 899 | 960 |
| Continuing operations | ||||
| Statement [line items] | ||||
| Income taxes paid (refund), classified as operating activities | 303 | 560 | 899 | 960 |
| Discontinued operations | ||||
| Statement [line items] | ||||
| Income taxes paid (refund), classified as investing activities | $ 88 | $ 88 | ||
| Income taxes paid (refund), classified as operating activities | $ 0 | $ 38 | ||