Retirement Benefits - Schedule of Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Pension Plans
Weighted-average assumptions used to determine net periodic benefit costs:
Discount rate	4.80%	5.10%	2.80%
Rate of compensation increase	4.30%	4.30%	3.50%
Expected return on plan assets	8.10%	8.10%	8.10%
Weighted-average assumptions used to determine benefit obligation as of December 31:
Discount rate	5.50%	4.80%	5.10%
Rate of compensation increase	4.00%	4.30%	4.30%
Retiree Health Benefit Plans
Weighted-average assumptions used to determine net periodic benefit costs:
Discount rate	5.00%	5.20%	3.00%
Expected return on plan assets	7.30%	7.30%	7.30%
Weighted-average assumptions used to determine benefit obligation as of December 31:
Discount rate	5.70%	5.00%	5.20%