Pension And Other Postretirement Benefits (Pension Plans With Accumulated Benefit Obligation In Excess Of Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Funded Pension Plans [Member] \| U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 18,292	$ 15,738
Accumulated benefit obligation	14,940	13,208
Fair value of plan assets	13,636	11,134
Funded Pension Plans [Member] \| Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3,616	4,037
Accumulated benefit obligation	3,026	3,671
Fair value of plan assets	1,381	3,499
Unfunded Pension Plans [Member] \| U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	2,667	2,436
Accumulated benefit obligation	1,447	1,475
Unfunded Pension Plans [Member] \| Pension Benefits - Non-U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	5,274	6,331
Accumulated benefit obligation	$ 4,629	$ 5,670

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Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets.

+ References

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-Publisher FASB
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Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets.

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