Retirement Benefits - Assumptions (Details)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Retirement Benefits [Abstract]
Discount rate	5.47%	4.91%	5.18%
Expected rate of return on plan assets	5.63%	6.47%	6.58%
Interest crediting rate	4.50%	4.50%	4.25%
Discount rate	5.24%	5.47%	4.91%
Interest crediting rate	4.50%	4.50%	4.50%