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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 5	$ 5	$ 9	$ 12
Interest Cost	109	91	217	182
Expected return on plan assets	(190)	(228)	(380)	(458)
Amortization of unrecognized loss (gain)	1	13	2	27
Amortization of Prior Service Benefit	(1)	(1)	(2)	(1)
Settlement Loss (Gain)	2	0	2	1
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	(74)	(120)	(152)	(237)
Other Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	1	0	1	0
Interest Cost	6	5	13	11
Amortization of unrecognized loss (gain)	1	24	1	47
Amortization of Prior Service Benefit	(1)	(231)	(1)	(461)
Curtailment (gain) loss	0	(1)	0	(1)
Defined Benefit Plan, Net Periodic Benefit (Credit) Cost	$ 7	$ (203)	$ 14	$ (404)