Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 3	$ 4	$ 7	$ 9
Interest Cost	156	163	313	326
Expected return on plan assets	(155)	(133)	(310)	(266)
Amortization of Prior Service Benefit	(1)	(1)	(2)	(2)
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	3	33	8	67
Other Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest Cost	10	10	20	20
Amortization of unrecognized loss (gain)	(4)	(3)	(9)	(6)
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	$ 6	$ 7	$ 11	$ 14