| **Employee Benefit Plans - Schedule of Benefit Obligation and Plan Assets (Details) - USD ($) $ in Millions** | 12 Months Ended |
|---------------------------------------------------------------------------------------------------------------|-----------------|
||
| **Change in benefit obligation:**                                                                             |            |   |   |
| Curtailment                                                                                                   | $ (18)          | $ (28) |   |
| U.S. Pension Benefits                                                                                         |            |   |   |
| **Change in benefit obligation:**                                                                             |            |   |   |
| Benefit obligation at beginning of year                                                                       | 735             | 728 |   |
| Service cost                                                                                                  | 52              | 64 | $ 70 |
| Interest cost                                                                                                 | 29              | 26 | 28 |
| Actuarial loss (gain)                                                                                         | (13)            | (4) |   |
| Benefits paid                                                                                                 | (63)            | (59) |   |
| Curtailment                                                                                                   | (12)            | (24) |   |
| Other                                                                                                         | (2)             | 4 |   |
| Foreign currency translation adjustments                                                                      | 0               | 0 |   |
| Benefit obligation at end of year                                                                             | 726             | 735 | 728 |
| **Change in plan assets:**                                                                                    |            |   |   |
| Fair value of plan assets at beginning of year                                                                | 595             | 648 |   |
| Actual return on plan assets                                                                                  | 29              | (5) |   |
| Employer contributions                                                                                        | 44              | 16 |   |
| Benefits paid                                                                                                 | (63)            | (59) |   |
| Other                                                                                                         | (5)             | (5) |   |
| Foreign currency translation adjustments                                                                      | 0               | 0 |   |
| Fair value of plan assets at end of year                                                                      | 600             | 595 | 648 |
| Funded status - underfunded at end of year                                                                    | (126)           | (140) |   |
| Accumulated benefit obligation                                                                                | 682             | 681 |   |
| Non-U.S. Pension Benefits                                                                                     |            |   |   |
| **Change in benefit obligation:**                                                                             |            |   |   |
| Benefit obligation at beginning of year                                                                       | 798             | 872 |   |
| Service cost                                                                                                  | 14              | 15 | 11 |
| Interest cost                                                                                                 | 27              | 30 | 34 |
| Actuarial loss (gain)                                                                                         | 165             | (23) |   |
| Benefits paid                                                                                                 | (38)            | (35) |   |
| Curtailment                                                                                                   | (2)             | (2) |   |
| Other                                                                                                         | 0               | (6) |   |
| Foreign currency translation adjustments                                                                      | (118)           | (53) |   |
| Benefit obligation at end of year                                                                             | 846             | 798 | 872 |
| **Change in plan assets:**                                                                                    |            |   |   |
| Fair value of plan assets at beginning of year                                                                | 713             | 767 |   |
| Actual return on plan assets                                                                                  | 118             | 4 |   |
| Employer contributions                                                                                        | 24              | 28 |   |
| Benefits paid                                                                                                 | (38)            | (35) |   |
| Other                                                                                                         | 0               | (6) |   |
| Foreign currency translation adjustments                                                                      | (118)           | (45) |   |
| Fair value of plan assets at end of year                                                                      | 699             | 713 | 767 |
| Funded status - underfunded at end of year                                                                    | (147)           | (85) |   |
| Accumulated benefit obligation                                                                                | 810             | 763 |   |
| Other Postretirement Benefits                                                                                 |            |   |   |
| **Change in benefit obligation:**                                                                             |            |   |   |
| Benefit obligation at beginning of year                                                                       | 107             | 122 |   |
| Service cost                                                                                                  | 4               | 5 | 6 |
| Interest cost                                                                                                 | 4               | 4 | 5 |
| Actuarial loss (gain)                                                                                         | 0               | (10) |   |
| Benefits paid                                                                                                 | (14)            | (11) |   |
| Curtailment                                                                                                   | (4)             | (2) |   |
| Other                                                                                                         | 0               | (1) |   |
| Foreign currency translation adjustments                                                                      | 0               | 0 |   |
| Benefit obligation at end of year                                                                             | 97              | 107 | 122 |
| **Change in plan assets:**                                                                                    |            |   |   |
| Fair value of plan assets at beginning of year                                                                | 0               | 0 |   |
| Actual return on plan assets                                                                                  | 0               | 0 |   |
| Employer contributions                                                                                        | 14              | 11 |   |
| Benefits paid                                                                                                 | (14)            | (11) |   |
| Other                                                                                                         | 0               | 0 |   |
| Foreign currency translation adjustments                                                                      | 0               | 0 |   |
| Fair value of plan assets at end of year                                                                      | 0               | 0 | $ 0 |
| Funded status - underfunded at end of year                                                                    | (97)            | (107) |   |
| Accumulated benefit obligation                                                                                | $ 97            | $ 107 |   |

| X                                                                                                                                                                                               |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Other
+ References
No definition available.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.
+ References
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date.  2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.
+ References
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|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.
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| - Definition
A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of contributions made by the employer to defined benefit plans.
+ References
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| - Definition
The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.
+ References
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount of gain (loss) from foreign currency exchange rate changes for benefit obligation for plans of a foreign operation whose functional currency is not the reporting currency.
+ References
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| - Definition
The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.
+ References
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|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.
+ References
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.
+ References
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| - Definition
Changes in the defined benefit obligation, not otherwise separately disclosed in the financial statements.
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No definition available.
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|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.
+ References
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