Retirement Plans and Other Postretirement Benefits - Weighted-Average Assumptions for Pensions and Other Benefits (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Weighted-average assumptions used to determine benefit obligations
Rate of compensation increase	4.50%	4.52%
Initial healthcare cost trend rate (pre-65 participants)	6.50%	6.25%
Ultimate healthcare cost trend rate (pre-65 participants)	4.50%	4.75%
Number of years to ultimate trend rate (pre-65 participants)	6 years	5 years
Initial healthcare cost trend rate (post-65 participants)	1.00%	2.00%
Ultimate healthcare cost trend rate (post-65 participants)	0.00%	2.00%
Interest crediting rate – cash balance pension plans	4.66%	4.54%
Weighted-average assumptions used to determine net periodic benefit costs
Initial healthcare cost trend rate (pre-65 participants)	6.25%	6.50%	6.00%
Ultimate healthcare cost trend rate (pre-65 participants)	4.75%	4.75%	4.75%
Number of years to ultimate trend rate (pre-65 participants)	4 years	5 years	3 years
Initial healthcare cost trend rate (post-65 participants)	2.00%	2.00%	2.00%
Ultimate healthcare cost trend rate (post-65 participants)	2.00%	2.00%	2.00%
Interest crediting rate – cash balance pension plans	4.54%	4.50%	4.50%
Pension Plans
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	5.68%	5.21%
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate (as a percent)	5.21%	5.56%	2.92%
Rate of compensation increase	4.52%	4.57%	4.00%
Expected long-term return on plan assets (as a percent)	6.90%	6.70%	5.00%
Other Benefits Plans
Weighted-average assumptions used to determine benefit obligations
Discount rate (as a percent)	5.71%	5.23%
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate (as a percent)	5.23%	5.58%	2.98%
Expected long-term return on plan assets (as a percent)	6.85%	6.80%	5.35%