Retirement Benefit Plans - Narrative (Details)	12 Months Ended
	Dec. 31, 2025
Defined Benefit Plan Disclosure [Line Items]
Employer matching contribution, percent of match, maximum	5.00%
Employees' Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account	4.07%
Select Executive Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account	5.15%
Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Assumptions used calculating benefit obligation, interest rate to annuitize cash balance account	6.01%