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%