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Supplemental Equity and Comprehensive Income (Loss) Information (Tables) | 12 Months Ended
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Dec. 31, 2024
Stockholders' Equity Note [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M | The table below presents the changes in accumulated other comprehensive income (loss) attributable to 3M (AOCI), including the reclassifications out of AOCI by component for the year ended December 31, 2024 and 2023:
(Millions) |  | Cumulative Translation Adjustment |  | Defined Benefit Pension and Postretirement Plans Adjustment |  | Cash Flow Hedging Instruments, Unrealized Gain (Loss) |  | Total Accumulated Other Comprehensive Income (Loss)
Balance at December 31, 2021, net of tax: |  | $ | (1,943) |  |  | $ | (4,753) |  |  | $ | (54) |  |  | $ | (6,750) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | (850) |  |  | 866 |  |  | 159 |  |  | 175 |
Amounts reclassified out |  | — |  |  | 458 |  |  | (98) |  | 360 |
Total other comprehensive income (loss), before tax |  | (850) |  |  | 1,324 |  |  | 61 |  |  | 535 |
Tax effect 2 |  | (35) |  | (409) |  |  | (14) |  |  | (458) |
Total other comprehensive income (loss), net of tax |  | (885) |  |  | 915 |  |  | 47 |  |  | 77 |
Balance at December 31, 2022, net of tax: |  | (2,828) |  |  | (3,838) |  |  | (7) |  | (6,673) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | 277 |  | (763) |  |  | 81 |  |  | (405)
Amounts reclassified out |  | 54 |  |  | 252 |  |  | (143) |  |  | 163 |
Total other comprehensive income (loss), before tax |  | 331 |  | (511) |  |  | (62) |  |  | (242)
Tax effect 2 |  | (9) |  | 131 |  |  | 15 |  | 137 |
Total other comprehensive income (loss), net of tax |  | 322 |  | (380) |  |  | (47) |  |  | (105)
Balance at December 31, 2023, net of tax: |  | (2,506) |  |  | (4,218) |  |  | (54) |  |  | (6,778) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | (563) |  |  | 123 |  |  | 128 |  |  | (312) |
Amounts reclassified out |  | 38 |  |  | 1,127 |  |  | (78) |  | 1,087 |
Total other comprehensive income (loss), before tax |  | (525) |  |  | 1,250 |  |  | 50 |  |  | 775 |
Tax effect 2 |  | 14 |  | (315) |  |  | (11) |  |  | (312) |
Total other comprehensive income (loss), net of tax |  | (511) |  |  | 935 |  |  | 39 |  |  | 463 |
Solventum spin-off |  | 64 |  |  | 520 |  |  | — |  |  | 584 |
Balance at December 31, 2024, net of tax: |  | $ | (2,953) |  |  | $ | (2,763) |  |  | $ | (15) |  |  | $ | (5,731) |
Includes tax expense (benefit) reclassified out of AOCI related to the following:
| (millions) |  |  |  |  |  | 2024 |  | 2023 |  | 2022 |
| Cumulative Translation Adjustment |  |  |  |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |
| Defined benefit pension and postretirement plans adjustment |  |  |  |  |  | (268) |  |  | (60) |  |  | (108) |  |
| Cash flow hedging instruments, unrealized gain/loss |  |  |  |  |  | 18 |  |  | 33 |  |  | 23 |  |

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