Retirement-Related Benefits - Contributions (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Mar. 31, 2021 |
Mar. 31, 2020 |
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| Retirement-Related Benefits | ||
| Employer contributions | $ 172 | $ 217 |
| Contributions by employer - Noncash | 129 | 70 |
| Nonpension Postretirement Benefit Plans | Non-U.S. DB plans | ||
| Retirement-Related Benefits | ||
| Contributions by employer - Noncash | 150 | 185 |
| U.S. | ||
| Retirement-Related Benefits | ||
| Employer contributions | 106 | 136 |
| Non-U.S. | ||
| Retirement-Related Benefits | ||
| Employer contributions | $ 66 | $ 82 |
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- Definition Noncash contributions made by the employer during the period to a defined benefit plan. These contributions may be in the form of securities. No definition available.
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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