Employee Pension and Other Postretirement Benefits Net Benefit Costs (Table) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Pension Benefits
Defined Benefit Plan Disclosure
Service cost	$ 45	$ 50	$ 135	$ 149
Interest cost	65	60	194	180
Expected return on plan assets	(148)	(138)	(446)	(414)
Amortization of prior service cost (credit)	6	3	16	11
Amortization of net actuarial loss (gain)	8	28	26	82
Settlement gain	(4)		(4)
Net periodic benefit cost	(28)	3	(79)	8
Other Benefits
Defined Benefit Plan Disclosure
Service cost	2	2	7	7
Interest cost	3	4	10	11
Amortization of prior service cost (credit)	(1)	(1)	(3)	(3)
Amortization of net actuarial loss (gain)		(1)	(2)	(2)
Net periodic benefit cost	$ 4	$ 4	$ 12	$ 13