Retirement Benefits Plan Assumptions (Details 5)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Benefit Obligation [Member]
Defined Benefit Plan Disclosure (Table Amounts)
Initial health care cost trend rate assumed for the next year		6.20%	6.50%	5.30%
Rate to which the health care cost trend rate is assumed to decline (the ultimate trend rate)		5.00%	5.00%	5.00%
Year that the health care cost trend rate reaches the ultimate trend rate		2028	2028	2023
Pension Benefits
Assumptions Used to Determine Benefit Obligation
Discount rate		5.15%	5.54%	2.98%
Initial cash balance crediting rate assumed for the next year		4.02%	3.96%	2.25%
Rate to which the cash balance crediting rate is assumed to increase/decrease (the ultimate rate)		4.02%	3.88%	2.25%
Year that the cash balance crediting rate reaches the ultimate rate		2029	2028	2027
Rate of compensation increase		3.00%	3.00%	3.00%
Assumptions Used to Determine Benefit Cost
Discount rate		5.54%	2.98%
Expected long-term return on plan assets		7.50%	7.50%
Initial cash balance crediting rate assumed for the next year		3.96%	2.25%
Rate to which the cash balance crediting rate is assumed to increase (the ultimate rate)		3.88%	2.25%
Year that the cash balance crediting rate reaches the ultimate rate		2028	2027
Rate of compensation increase		3.00%	3.00%
Pension Benefits | Subsequent Event [Member]
Assumptions Used to Determine Benefit Cost
Discount rate	5.15%
Expected long-term return on plan assets	7.50%
Initial cash balance crediting rate assumed for the next year	4.02%
Rate to which the cash balance crediting rate is assumed to increase (the ultimate rate)	4.02%
Year that the cash balance crediting rate reaches the ultimate rate	2029
Rate of compensation increase	3.00%
Post-retirement Benefit Cost [Member]
Defined Benefit Plan Disclosure (Table Amounts)
Initial health care cost trend rate assumed for the next year		6.50%	5.30%
Rate to which the health care cost trend rate is assumed to decline (the ultimate trend rate)		5.00%	5.00%
Year that the health care cost trend rate reaches the ultimate trend rate		2028	2023
Post-retirement Benefit Cost [Member] | Subsequent Event [Member]
Defined Benefit Plan Disclosure (Table Amounts)
Initial health care cost trend rate assumed for the next year	6.20%
Rate to which the health care cost trend rate is assumed to decline (the ultimate trend rate)	5.00%
Year that the health care cost trend rate reaches the ultimate trend rate	2028
Medical and Life Benefits
Assumptions Used to Determine Benefit Obligation
Discount rate		5.20%	5.57%	2.93%
Assumptions Used to Determine Benefit Cost
Discount rate		5.57%	2.93%
Expected long-term return on plan assets		7.23%	7.19%
Medical and Life Benefits | Subsequent Event [Member]
Assumptions Used to Determine Benefit Cost
Discount rate	5.20%
Expected long-term return on plan assets	7.12%