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Pension and Postretirement Benefit Plans - Narrative (Details) | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
May 31, 2019 USD ($) person | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2019 USD ($)
Benefit Plan Information |  |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  | $ (76,000,000) |  | $ (114,000,000) | $ (356,000,000) | $ (344,000,000) |
Qualified and Non-qualified Pension Benefits | Funded |  |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |  |
Company contributions year to date |  |  |  |  | 126,000,000 |  |
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 |  |  |  |  | 3,000,000 |  |
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 |  | $ (76,000,000) |  | $ (114,000,000) | $ (356,000,000) | $ (344,000,000) |
Total Accumulated Other Comprehensive Income (Loss) | Postretirement Benefits | Funded |  |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |  |
Defined benefit pension and postretirement plans adjustment |  |  | $ 150,000,000 |  |  |  |
Forecast | Qualified and Non-qualified Pension Benefits | Funded | Maximum |  |  |  |  |  |  |
Benefit Plan Information |  |  |  |  |  |  |
Estimated pension and postretirement employer contributions in current fiscal year |  |  |  |  |  |  | $ 200,000,000

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- Definition The number of additional years of age for certain benefit calculations for enhanced pension benefits that are offered to and accepted by employees in connection with their termination of employment that are only offered for a short period of time. + References No definition available. + Details
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