Pension Plans and Other Post Employment Benefit Plans Components of net periodic benefit cost (credit) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 5	$ 4
Interest Cost	174	108
Expected return on plan assets	(152)	(190)
Amortization of unrecognized loss (gain)	0	1
Amortization of Prior Service Benefit	1	1
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	26	(78)
Other Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest Cost	12	7
Amortization of unrecognized loss (gain)	(2)	0
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	$ 10	$ 7