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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Supplemental cash flow information |
(Millions) |  | 2021 |  | 2020 |  | 2019
Cash income tax payments, net of refunds |  | $ | 1,695 |  |  | $ | 1,351 |  |  | $ | 1,198 |
Cash interest payments |  | 472 |  |  | 524 |  |  | 370 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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