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Pension Benefit Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
NAV per share, investment redemption, notice period |  | 90 days |  |
Expense for all defined benefit and defined contributions pension plans |  | $ 224 | $ 203 | $ 167
Pension benefit plans |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Unrecognized prior service credits, before tax |  | (1) |  |
Prior service credit, after tax |  | (1) |  |
Unrecognized actuarial losses, net of tax |  | (1,200) |  |
Unrecognized actuarial losses, net of tax |  | $ (919) |  |
Pension benefit plans | U.S. Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term rate of return on asset assumptions |  | 7.00% | 7.00% | 7.00%
Employer contributions |  | $ 140 | $ 10 |
Expected employer contributions within the next year |  | 10 |  |
Curtailment and settlement gains (losses) recognized |  | $ 0 | $ 0 |
Pension benefit plans | U.S. Pension Benefits | Scenario, forecast |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term rate of return on asset assumptions | 6.75% |  |  |
Pension benefit plans | U.S. Pension Benefits | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, target allocation, percentage |  | 60.00% |  |
Pension benefit plans | U.S. Pension Benefits | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan, plan assets, target allocation, percentage |  | 70.00% |  |
Pension benefit plans | Non-U.S. Pension Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term rate of return on asset assumptions |  | 3.40% | 3.90% |
Employer contributions |  | $ 51 | $ 44 |
Expected employer contributions within the next year |  | 44 |  |
Curtailment and settlement gains (losses) recognized |  | $ (1) | (7) |
Settlement loss, net of tax |  |  | $ (6) |
Settlement loss, per diluted common share |  |  | $ (0.01) |
Pension benefit plans | Non-U.S. Pension Benefits | Minimum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term rate of return on asset assumptions |  | 0.50% | 0.80% |
Pension benefit plans | Non-U.S. Pension Benefits | Maximum |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term rate of return on asset assumptions |  | 5.00% | 5.00% |
Pension benefit plans | Non-U.S. Pension Benefits | Weighted average |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Long-term rate of return on asset assumptions |  | 3.40% | 3.90% |

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