Benefit Plans and Other Postretirement Benefits, Expected long-term rate of return (Details) - Pension Benefits - United States	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Expected long-term return on assets (as a percent)	5.50%	5.50%	6.00%
Equity securities
Defined Benefit Plan Disclosure
Target allocation (as a percent)	15.00%	25.00%
Actual Investment Allocation used during the year (as a percent) as the basis for determining the expected long-term rate of return	25.00%
Expected long-term return on assets (as a percent)	6.00%
Fixed income securities
Defined Benefit Plan Disclosure
Target allocation (as a percent)	85.00%	75.00%
Actual Investment Allocation used during the year (as a percent) as the basis for determining the expected long-term rate of return	75.00%
Expected long-term return on assets (as a percent)	5.30%