(Estimated Total Future Postretirement Benefit Payments, Net Of Participant Contributions And Estimated Future Medicare Part D Subsidy Receipts) (Details) - Other Postretirement Benefits Plan [Member] $ in Millions	Dec. 31, 2021 USD ($)
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit Payments, year 1	$ 18
Benefit Payments, year 2	16
Benefit Payments, year 3	15
Benefit Payments, year 4	14
Benefit Payments, year 5	14
Benefit Payments, year 6-10	57
Subsidy Receipts, year 1	1
Subsidy Receipts, year 2	1
Subsidy Receipts, year 3	1
Subsidy Receipts, year 4	1
Subsidy Receipts, year 5	1
Subsidy Receipts, year 6-10	3
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit Payments, year 1	0
Benefit Payments, year 2	0
Benefit Payments, year 3	0
Benefit Payments, year 4	0
Benefit Payments, year 5	0
Benefit Payments, year 6-10	$ 1