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Supplemental Equity and Comprehensive Income Information (Tables) | 9 Months Ended
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Sep. 30, 2021
Stockholders' Equity Note [Abstract] |
Consolidated statement of changes in equity | Consolidated Changes in Equity Three months ended September 30, 2021
|  |  |  | 3M Company Shareholders |  |
(Millions) |  | Total |  | Common Stock and Additional Paid-in Capital |  | Retained Earnings |  | Treasury Stock |  | Accumulated Other Comprehensive Income (Loss) |  | Non- controlling Interest
Balance at June 30, 2021 |  | $ | 14,516 |  | $ | 6,346 |  | $ | 44,824 |  | $ | (29,236) |  |  | $ | (7,486) |  |  | $ | 68
Net income |  | 1,437 |  |  |  | 1,434 |  |  |  |  |  | 3
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |  |  |  |  |  |
Cumulative translation adjustment |  | (302) |  |  |  |  |  |  |  | (301) |  | (1) |
Defined benefit pension and post-retirement plans adjustment |  | 119 |  |  |  |  |  |  |  | 119 |  | —
Cash flow hedging instruments |  | 48 |  |  |  |  |  |  |  |  | 48 |  |  | —
Total other comprehensive income (loss), net of tax |  | (135) |  |  |  |  |  |  |  |  |  |
Dividends declared |  | (856) |  |  |  |  | (856) |  |  |  |  |  |  |
Stock-based compensation |  | 46 |  | 46 |  |  |  |  |  |  |  |
Reacquired stock |  | (563) |  |  |  |  |  |  | (563) |  |  |  |  |
Issuances pursuant to stock option and benefit plans |  | 85 |  |  |  | (41) |  |  | 126 |  |  |  |
Balance at September 30, 2021 |  | $ | 14,530 |  | $ | 6,392 |  | $ | 45,361 |  | $ | (29,673) |  |  | $ | (7,620) |  |  | $ | 70
Nine months ended September 30, 2021
|  |  |  | 3M Company Shareholders |  |
(Millions) |  | Total |  | Common Stock and Additional Paid-in Capital |  | Retained Earnings |  | Treasury Stock |  | Accumulated Other Comprehensive Income (Loss) |  | Non- controlling Interest
Balance at December 31, 2020 |  | $ | 12,931 |  | $ | 6,171 |  | $ | 43,821 |  | $ | (29,404) |  |  | $ | (7,721) |  |  | $ | 64
Net income |  | 4,589 |  |  |  | 4,582 |  |  |  |  |  | 7
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |  |  |  |  |  |
Cumulative translation adjustment |  | (354) |  |  |  |  |  |  |  |  | (353) |  |  | (1)
Defined benefit pension and post-retirement plans adjustment |  | 359 |  |  |  |  |  |  |  | 359 |  | —
Cash flow hedging instruments |  | 95 |  |  |  |  |  |  |  | 95 |  | —
Total other comprehensive income (loss), net of tax |  | 100 |  |  |  |  |  |  |  |  |  |
Dividends declared |  | (2,572) |  |  |  |  | (2,572) |  |  |  |  |  |  |
Stock-based compensation |  | 221 |  | 221 |  |  |  |  |  |  |  |
Reacquired stock |  | (1,305) |  |  |  |  |  |  | (1,305) |  |  |  |  |
Issuances pursuant to stock option and benefit plans |  | 566 |  |  |  | (470) |  |  | 1,036 |  |  |  |
Balance at September 30, 2021 |  | $ | 14,530 |  | $ | 6,392 |  | $ | 45,361 |  | $ | (29,673) |  |  | $ | (7,620) |  |  | $ | 70
Three months ended September 30, 2020
|  |  |  | 3M Company Shareholders |  |
(Millions) |  | Total |  | Common Stock and Additional Paid-in Capital |  | Retained Earnings |  | Treasury Stock |  | Accumulated Other Comprehensive Income (Loss) |  | Non- controlling Interest
Balance at June 30, 2020 |  | $ | 10,925 |  | $ | 6,083 |  | $ | 42,786 |  | $ | (29,699) |  |  | $ | (8,303) |  |  | $ | 58
Net income |  | 1,434 |  |  |  | 1,430 |  |  |  |  |  | 4 |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |  |  |  |  |  |
Cumulative translation adjustment |  | 271 |  |  |  |  |  |  |  | 270 |  | 1
Defined benefit pension and post-retirement plans adjustment |  | 116 |  |  |  |  |  |  |  | 116 |  | —
Cash flow hedging instruments |  | (71) |  |  |  |  |  |  |  |  | (71) |  |  | —
Total other comprehensive income (loss), net of tax |  | 316 |  |  |  |  |  |  |  |  |  |
Dividends declared |  | (847) |  |  |  |  | (847) |  |  |  |  |  |  |
Stock-based compensation |  | 42 |  | 42 |  |  |  |  |  |  |  |
Reacquired stock |  | (1) |  |  |  |  |  | (1) |  |  |  |
Issuances pursuant to stock option and benefit plans |  | 90 |  |  |  | (40) |  |  | 130 |  |  |  |
Balance at September 30, 2020 |  | $ | 11,959 |  | $ | 6,125 |  | $ | 43,329 |  | $ | (29,570) |  |  | $ | (7,988) |  |  | $ | 63
Nine months ended September 30, 2020
|  |  |  | 3M Company Shareholders |  |
(Millions) |  | Total |  | Common Stock and Additional Paid-in Capital |  | Retained Earnings |  | Treasury Stock |  | Accumulated Other Comprehensive Income (Loss) |  | Non- controlling Interest
Balance at December 31, 2019 |  | $ | 10,126 |  | $ | 5,916 |  | $ | 42,130 |  | $ | (29,849) |  |  | $ | (8,134) |  |  | $ | 63
Net income |  | 4,047 |  |  |  | 4,044 |  |  |  |  |  | 3 |
Other comprehensive income (loss), net of tax: |  |  |  |  |  |  |  |  |  |  |  |
Cumulative translation adjustment |  | (67) |  |  |  |  |  |  |  |  | (65) |  |  | (2) |
Defined benefit pension and post-retirement plans adjustment |  | 271 |  |  |  |  |  |  |  | 271 |  | —
Cash flow hedging instruments |  | (60) |  |  |  |  |  |  |  | (60) |  | —
Total other comprehensive income (loss), net of tax |  | 144 |  |  |  |  |  |  |  |  |  |  |
Dividends declared |  | (2,540) |  |  |  |  | (2,540) |  |  |  |  |  |  |
Purchase of subsidiary shares |  | (1) |  |  |  |  |  |  |  |  |  |  | (1) |
Stock-based compensation |  | 209 |  | 209 |  |  |  |  |  |  |  |
Reacquired stock |  | (357) |  |  |  |  |  |  | (357) |  |  |  |  |
Issuances pursuant to stock option and benefit plans |  | 331 |  |  |  | (305) |  |  | 636 |  |  |  |
Balance at September 30, 2020 |  | $ | 11,959 |  | $ | 6,125 |  | $ | 43,329 |  | $ | (29,570) |  |  | $ | (7,988) |  |  | $ | 63
Changes in accumulated other comprehensive income (loss) attributable to 3M | Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component Three months ended September 30, 2021
(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 June 30, 2021, net of tax: |  | $ | (1,502) |  |  | $ | (5,858) |  |  | $ | (126) |  |  | $ | (7,486) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | (286) |  | — |  | 44 |  |  | (242)
Amounts reclassified out |  | — |  | 158 |  | 18 |  | 176
Total other comprehensive income (loss), before tax |  | (286) |  | 158 |  | 62 |  |  | (66)
Tax effect |  | (15) |  | (39) |  |  | (14) |  | (68) |
Total other comprehensive income (loss), net of tax |  | (301) |  | 119 |  | 48 |  |  | (134)
Balance at September 30, 2021, net of tax: |  | $ | (1,803) |  |  | $ | (5,739) |  |  | $ | (78) |  |  | $ | (7,620) |
Nine months ended September 30, 2021
(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, 2020, net of tax: |  | $ | (1,450) |  |  | $ | (6,098) |  |  | $ | (173) |  |  | $ | (7,721) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | (303) |  |  | — |  | 84 |  | (219)
Amounts reclassified out |  | — |  | 477 |  | 39 |  | 516
Total other comprehensive income (loss), before tax |  | (303) |  |  | 477 |  | 123 |  | 297
Tax effect |  | (50) |  |  | (118) |  |  | (28) |  |  | (196) |
Total other comprehensive income (loss), net of tax |  | (353) |  |  | 359 |  | 95 |  | 101
Balance at September 30, 2021, net of tax: |  | $ | (1,803) |  |  | $ | (5,739) |  |  | $ | (78) |  |  | $ | (7,620) |
Three months ended September 30, 2020
(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 June 30, 2020, net of tax: |  | $ | (2,234) |  |  | $ | (6,049) |  |  | $ | (20) |  | $ | (8,303) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | 237 |  | — |  |  | (72) |  |  | 165
Amounts reclassified out |  | — |  | 149 |  | (21) |  |  | 128
Total other comprehensive income (loss), before tax |  | 237 |  | 149 |  | (93) |  |  | 293
Tax effect |  | 33 |  | (33) |  |  | 22 |  | 22 |
Total other comprehensive income (loss), net of tax |  | 270 |  | 116 |  | (71) |  |  | 315
Balance at September 30, 2020, net of tax: |  | $ | (1,964) |  |  | $ | (5,933) |  |  | $ | (91) |  |  | $ | (7,988) |
Nine months ended September 30, 2020
(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, 2019, net of tax: |  | $ | (1,899) |  |  | $ | (6,204) |  |  | $ | (31) |  |  | $ | (8,134) |
Other comprehensive income (loss), before tax: |  |  |  |  |  |  |  |
Amounts before reclassifications |  | (98) |  |  | (80) |  |  | (10) |  | (188) |
Amounts reclassified out |  | — |  | 446 |  | (68) |  |  | 378
Total other comprehensive income (loss), before tax |  | (98) |  |  | 366 |  | (78) |  | 190 |
Tax effect |  | 33 |  | (95) |  |  | 18 |  |  | (44) |
Total other comprehensive income (loss), net of tax |  | (65) |  |  | 271 |  | (60) |  | 146 |
Balance at September 30, 2020, net of tax |  | $ | (1,964) |  |  | $ | (5,933) |  |  | $ | (91) |  |  | $ | (7,988) |
Reclassifications out of accumulated other comprehensive income | Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M
Details about Accumulated Other Comprehensive Income Components |  | Amount Reclassified from Accumulated Other Comprehensive Income |  | Location on Income Statement
|  | Three months ended September 30, |  | Nine months ended September 30, |
(Millions) |  | 2021 |  | 2020 |  | 2021 |  | 2020 |
Defined benefit pension and postretirement plans adjustments |  |  |  |  |  |  |  |  |  |
Gains (losses) associated with defined benefit pension and postretirement plans amortization |  |  |  |  |  |  |  |  |  |
Transition asset |  | $ | (1) |  |  | $ | (1) |  | $ | (2) |  |  | $ | (2) |  |  | See Note 11
Prior service benefit |  | 15 |  | 15 |  | 45 |  | 46 |  | See Note 11
Net actuarial loss |  | (172) |  |  | (162) |  |  | (518) |  |  | (487) |  |  | See Note 11
Curtailments/Settlements |  | — |  |  | (1) |  |  | (2) |  |  | (3) |  |  | See Note 11
Total before tax |  | (158) |  |  | (149) |  |  | (477) |  |  | (446) |  |  |
Tax effect |  | 39 |  | 33 |  | 118 |  | 108 |  | Provision for income taxes
Net of tax |  | (119) |  |  | (116) |  |  | (359) |  |  | (338) |  |  |
Cash flow hedging instruments gains (losses) |  |  |  |  |  |  |  |  |  |
Foreign currency forward/option contracts |  | (15) |  |  | 23 |  | (32) |  |  | 74 |  | Cost of sales
Interest rate contracts |  | (3) |  |  | (2) |  |  | (7) |  |  | (6) |  |  | Interest expense
Total before tax |  | (18) |  |  | 21 |  | (39) |  |  | 68 |  |
Tax effect |  | 4 |  | (5) |  |  | 9 |  | (16) |  |  | Provision for income taxes
Net of tax |  | (14) |  |  | 16 |  | (30) |  |  | 52 |  |
Total reclassifications for the period, net of tax |  | $ | (133) |  |  | $ | (100) |  |  | $ | (389) |  |  | $ | (286) |  |  |

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