Employment Benefit Plans Assumptions Used (Details) - Pension Benefits - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate, used to determine net cost		2.70%	2.30%	3.20%
Expected long-term rate of return on plan assets, used to determine net cost		6.50%	6.70%	6.70%
Rate of compensation increase, used to determine net cost		3.10%	3.10%	3.10%
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Discount rate, used to determine benefit obligations		5.20%	2.70%
Rate of compensation increase, used to determine benefit obligation		3.10%	3.10%
Assumptions Sensitivity Analysis [Abstract]
Effect of 50 basis point decrease in discount rate		$ 4
Effect of 50 basis point increase in discount rate		4
Effect of 50 basis point decrease in rate of return on plan assets		14
Effect of 50 basis point increase in rate of return on plan assets		$ 14
Forecast
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]
Discount rate, used to determine net cost	5.20%
Expected long-term rate of return on plan assets, used to determine net cost	6.70%