Pension Plans, Retirement Benefits and Savings Plans (Details) - Assumptions - United States [Member]	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pension Plans [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, cash balance interest crediting rate (percent)	4.01%	4.01%
Assumptions used to determine benefit obligations, future compensation increase rate (percent)	4.00%	4.00%
Assumptions used to determine net periodic benefit cost, expected long-term rate of return on assets (percent)	7.00%	6.50%
Pension Plans [Member] | Qualified Plan [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, discount rate (percent)	5.02%	5.19%
Assumptions used to determine net periodic benefit cost, discount rate used to measure service cost (percent)	5.27%	3.18%
Assumptions used to determine net periodic benefit cost, discount rate used to measure interest cost (percent)	5.18%	2.34%
Pension Plans [Member] | Nonqualified Plan [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, discount rate (percent)	4.94%	5.13%
Assumptions used to determine net periodic benefit cost, discount rate used to measure service cost (percent)	5.16%	2.92%
Assumptions used to determine net periodic benefit cost, discount rate used to measure interest cost (percent)	5.11%	2.23%
Postretirement Benefit Plans [Member]
Defined benefit plan disclosure
Assumptions used to determine benefit obligations, discount rate (percent)	4.88%	5.08%
Assumptions used to determine net periodic benefit cost, discount rate used to measure interest cost (percent)	5.03%	2.08%
Assumptions used to determine net periodic benefit cost, expected long-term rate of return on assets (percent)	4.00%	4.00%
Assumed health care cost trend rates, medical, following year (percent)	(2.78%)	9.50%
Assumed health care cost trend rates, rate to which the cost trend rate is assumed to decline (ultimate trend rate) (percent)	4.50%	4.50%
Assumed health care cost trend rates, medical, year that the rate reaches the ultimate trend rate	2033	2032
Assumed health care cost trend rates, following year, Company baseline (percent)	8.00%