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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract] |
Summary of Supplemental Cash Flow Information |
| Six Months Ended June 30,
(In millions) | 2022 |  | 2021
Net cash provided by operating activities included: |  |  |
Interest paid (net of amounts capitalized) | $ | 519 |  |  | $ | 649 |
Net income taxes paid to (received from) taxing authorities | 1,123 |  |  | 319 |
Non-cash investing and financing activities: |  |  |
Book value of equity method investment(a) | 25 |  |  | — |
(a) Represents the book value of MPC’s equity method investment in Watson Cogeneration Company at June 1, 2022 prior to MPC buying out the remaining interest in Watson Cogeneration Company. See Note 14 for additional information.
Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures | The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. The following is a reconciliation of additions to property, plant and equipment to total capital expenditures:
| Six Months Ended June 30,
(In millions) | 2022 |  | 2021
Additions to property, plant and equipment per the consolidated statements of cash flows | $ | 993 |  |  | $ | 606 |
Decrease in capital accruals | (3) |  |  | (19) |
Total capital expenditures | $ | 990 |  |  | $ | 587 |

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