v3.22.4
Employee future benefits - Composition of Plan Assets (Details)
Dec. 31, 2022
Dec. 31, 2021
Employee Benefits [Abstract]    
Cash and cash equivalents 3.00% 3.00%
Equity securities 60.00% 60.00%
Debt securities 37.00% 37.00%
Total 100.00% 100.00%