(Net Periodic Pension Expense For Qualified And Nonqualified U.S. Defined Benefit Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 48	$ 85	$ 100
Interest cost	459	338	333
Expected return on plan assets	(530)	(649)	(705)
Actuarial loss (gain)	93	87	138
Amortization of prior service cost	23	23	22
Special termination benefits	1	0	0
Net periodic pension (income) expense	94	(116)	(112)
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	3	5
Interest cost	3	2	4
Expected return on plan assets	(1)	(1)	(7)
Actuarial loss (gain)	(1)	1	2
Amortization of prior service cost	0	0	0
Special termination benefits	0	0	0
Net periodic pension (income) expense	$ 5	$ 5	$ 4