Employee Benefit Plans - PAC - Plan Assumptions (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Postretirement
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.35%	4.54%	2.95%
Discount rate	5.58%	2.95%	2.59%
Expected return on plan assets	5.84%	4.20%	3.35%
Other Postretirement | PAC
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.20%	5.50%	2.90%
Discount rate	5.50%	2.90%	2.50%
Expected return on plan assets	4.78%	3.44%	2.90%
U.S. | Pension
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.36%	5.65%	2.98%
Interest crediting rates for cash balance plan, year one	4.19%	3.25%	2.45%
Interest crediting rates for cash balance plan, year two	4.58%	4.25%	2.56%
Interest crediting rates for cash balance plan, year three	4.58%	4.25%	2.56%
Interest crediting rates for cash balance plan, year four	3.73%	3.65%	2.83%
Interest crediting rates for cash balance plan, year five		3.65%	2.83%
Interest crediting rates for cash balance plan, year six			2.83%
Discount rate	5.65%	2.98%	2.60%
Expected return on plan assets	6.10%	4.30%	5.39%
U.S. | Pension | PAC
Defined Benefit Plan Disclosure [Line Items]
Discount rate	5.20%	5.55%	2.90%
Discount rate	5.55%	2.90%	2.50%
Expected return on plan assets	6.00%	4.70%	6.00%
U.S. | Pension | PAC | Nonunion pension plan participant
Defined Benefit Plan Disclosure [Line Items]
Interest crediting rates for cash balance plan, year one	4.73%	0.88%	0.82%
Interest crediting rates for cash balance plan, year two	5.98%	4.73%	0.88%
Interest crediting rates for cash balance plan, year three	5.98%	4.73%	0.88%
Interest crediting rates for cash balance plan, year four	3.10%	2.60%	1.90%
Interest crediting rates for cash balance plan, year five		2.60%	1.90%
Interest crediting rates for cash balance plan, year six			1.90%
U.S. | Pension | PAC | Union pension plan participant
Defined Benefit Plan Disclosure [Line Items]
Interest crediting rates for cash balance plan, year one	3.55%	1.94%	1.42%
Interest crediting rates for cash balance plan, year two	4.47%	3.55%	1.94%
Interest crediting rates for cash balance plan, year three	4.47%	3.55%	1.94%
Interest crediting rates for cash balance plan, year four	2.70%	2.40%	2.30%
Interest crediting rates for cash balance plan, year five		2.40%	2.30%
Interest crediting rates for cash balance plan, year six			2.30%