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Pension and Postretirement Benefit Plans - Narrative (Details) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
May 31, 2019 USD ($) person | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2020 USD ($)
Benefit Plan Information |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  | $ (58,000,000) | $ (196,000,000) | $ (177,000,000) | $ (280,000,000) |
International | Funded | United Kingdom Pension Plan |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  | 80,000,000 |  |  |  |
Qualified and Non-qualified Pension Benefits | Funded |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Company contributions year to date |  |  |  | 75,000,000 |  |
Qualified and Non-qualified Pension Benefits | United States | Funded |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Special termination benefits - number of additional years of pension service | 1 |  |  |  |  |
Special termination benefits - number of additional years of age for certain benefit calculations | 1 |  |  |  |  |
Special termination benefits - number of participants | person | 800 |  |  |  |  |
Special termination benefits charge |  |  | 35,000,000 |  |  |
Postretirement Benefits | Funded |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Company contributions year to date |  |  |  | 2,000,000 |  |
Maximum life insurance and death benefit to be paid under the modified 3M Retiree Life Insurance Plan postretirement benefit | $ 8,000 |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  |  | 150,000,000 |  |  |
Total Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  | (58,000,000) | (196,000,000) | $ (177,000,000) | $ (280,000,000) |
Total Accumulated Other Comprehensive Income (Loss) | International | Funded | United Kingdom Pension Plan |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  | $ 80,000,000 |  |  |  |
Total Accumulated Other Comprehensive Income (Loss) | Postretirement Benefits | Funded |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  |  | $ 150,000,000 |  |  |
Forecast | Pension and Postretirement Benefit Plans | Funded | Maximum |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |
Estimated pension and postretirement employer contributions in current fiscal year |  |  |  |  |  | $ 200,000,000

X
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