Post-Employment Benefits - Weighted-Average Assumptions Used in Determining Net Periodic Benefit Cost (Details) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Defined benefit plans | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Discount rate for determining service cost | 2.60% | 3.10% | 4.00% |
| Discount rate for determining interest cost | 2.20% | 3.00% | 4.00% |
| Expected long-term rate of return on plan assets | 7.10% | 7.10% | 7.60% |
| Expected rate of change in compensation | 4.60% | 4.60% | 4.60% |
| Cash balance interest crediting rate | 2.80% | 2.80% | 2.80% |
| Other post-employment plans | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Discount rate for determining service cost | 3.00% | 3.70% | 4.70% |
| Discount rate for determining interest cost | 2.20% | 3.20% | 4.30% |