| Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M |
Changes in Accumulated Other Comprehensive Income (Loss) Attributable to 3M by Component | | | | | | | | | | | | | | | | | | | Defined Benefit | | Cash Flow | | Total | | | | | | | Pension and | | Hedging | | Accumulated | | | | Cumulative | | Postretirement | | Instruments, | | Other | | | | Translation | | Plans | | Unrealized | | Comprehensive | | (Millions) | | Adjustment | | Adjustment | | Gain (Loss) | | Income (Loss) | | Balance at December 31, 2017, net of tax: | | $ | (1,638) | | $ | (5,276) | | $ | (112) | | $ | (7,026) | | Other comprehensive income (loss), before tax: | | | | | | | | | | | | | | Amounts before reclassifications | | | (414) | | | 55 | | | 133 | | | (226) | | Amounts reclassified out | | | — | | | 606 | | | 96 | | | 702 | | Total other comprehensive income (loss), before tax | | | (414) | | | 661 | | | 229 | | | 476 | | Tax effect | | | (47) | | | (217) | | | (53) | | | (317) | | Total other comprehensive income (loss), net of tax | | | (461) | | | 444 | | | 176 | | | 159 | | Impact from purchase of subsidiary shares | | | 1 | | | — | | | — | | | 1 | | Balance at December 31, 2018, net of tax: | | $ | (2,098) | | $ | (4,832) | | $ | 64 | | $ | (6,866) | | Impact of adoption of ASU No. 2018-02 | | | (13) | | | (817) | | | (23) | | | (853) | | Other comprehensive income (loss), before tax: | | | | | | | | | | | | | | Amounts before reclassifications | | | 102 | | | (1,227) | | | (26) | | | (1,151) | | Amounts reclassified out | | | 142 | | | 459 | | | (70) | | | 531 | | Total other comprehensive income (loss), before tax | | | 244 | | | (768) | | | (96) | | | (620) | | Tax effect | | | (32) | | | 208 | | | 24 | | | 200 | | Total other comprehensive income (loss), net of tax | | | 212 | | | (560) | | | (72) | | | (420) | | Balance at December 31, 2019, net of tax: | | $ | (1,899) | | $ | (6,209) | | $ | (31) | | $ | (8,139) | | Other comprehensive income (loss), before tax: | | | | | | | | | | | | | | Amounts before reclassifications | | | 387 | | | (555) | | | (113) | | | (281) | | Amounts reclassified out | | | — | | | 676 | | | (71) | | | 605 | | Total other comprehensive income (loss), before tax | | | 387 | | | 121 | | | (184) | | | 324 | | Tax effect | | | 62 | | | 50 | | | 42 | | | 154 | | Total other comprehensive income (loss), net of tax | | | 449 | | | 171 | | | (142) | | | 478 | | Balance at December 31, 2020, net of tax: | | $ | (1,450) | | $ | (6,038) | | $ | (173) | | $ | (7,661) | |
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| Reclassifications out of Accumulated Other Comprehensive Income |
Reclassifications out of Accumulated Other Comprehensive Income Attributable to 3M | | | | | | | | | | | | | | | | | Amounts Reclassified from | | | | Details about Accumulated Other | | | Accumulated Other Comprehensive Income | | | | Comprehensive Income Components | | | Year ended December 31, | | Location on Income | | (Millions) | | | 2020 | | 2019 | | 2018 | | Statement | | Cumulative translation adjustment | | | | | | | | | | | | | | Deconsolidation of Venezuelan subsidiary | | | $ | — | | $ | (142) | | $ | — | | Other (expense) income, net | | Total before tax | | | | — | | | (142) | | | — | | | | Tax effect | | | | — | | | — | | | — | | Provision for income taxes | | Net of tax | | | $ | — | | $ | (142) | | $ | — | | | | | | | | | | | | | | | | | | Defined benefit pension and postretirement plans adjustments | | | | | | | | | | | | | | Gains (losses) associated with defined benefit pension and postretirement plans amortization | | | | | | | | | | | | | | Transition asset | | | $ | (2) | | $ | — | | $ | — | | See Note 13 | | Prior service benefit | | | | 62 | | | 69 | | | 76 | | See Note 13 | | Net actuarial loss | | | | (716) | | | (478) | | | (678) | | See Note 13 | | Curtailments/Settlements | | | | (20) | | | (48) | | | (4) | | See Note 13 | | Deconsolidation of Venezuelan subsidiary | | | | — | | | (2) | | | — | | Other (expense) income, net | | Total before tax | | | | (676) | | | (459) | | | (606) | | | | Tax effect | | | | 161 | | | 110 | | | 145 | | Provision for income taxes | | Net of tax | | | $ | (515) | | $ | (349) | | $ | (461) | | | | | | | | | | | | | | | | | | Cash flow hedging instruments gains (losses) | | | | | | | | | | | | | | Foreign currency forward/option contracts | | | $ | 80 | | $ | 74 | | $ | (95) | | Cost of sales | | Interest rate contracts | | | | (9) | | | (4) | | | (1) | | Interest expense | | Total before tax | | | | 71 | | | 70 | | | (96) | | | | Tax effect | | | | (17) | | | (17) | | | 19 | | Provision for income taxes | | Net of tax | | | $ | 54 | | $ | 53 | | $ | (77) | | | | Total reclassifications for the period, net of tax | | | $ | (461) | | $ | (438) | | $ | (538) | | | |
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