Benefit Plans - Narrative (Details) - Pension benefits - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2024	Sep. 30, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Service cost, refund	$ 38	$ 38
Discount rate	5.62%	5.02%	5.35%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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