Employee Benefit Plans - Schedule of Net Benefit Expense Recorded on the Income Statement (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Components of expense/ (income) related to net benefit expense [Abstract]
Interest Cost	$ 106	$ 111
Amortization of Net Loss	18	29
Total Income Included in Other Income - Net	(50)	(29)	$ (79)
Pension Benefits
Components of expense/ (income) related to net benefit expense [Abstract]
Service Cost Included in Labor and Fringe	24	24	32
Interest Cost	106	111	64
Expected Return on Plan Assets	(168)	(164)	(188)
Amortization of Net Loss	18	29	50
Total Income Included in Other Income - Net	(44)	(24)	(74)
Net Periodic Benefit Credit	(20)	0	(42)
Settlement Loss	0	0	1
Total Periodic Benefit Credit	$ (20)	$ 0	$ (41)