Pensions And Other Postretirement Benefits Pension Benefit Payments (Details) $ in Millions	Dec. 31, 2018 USD ($)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payments [Abstract]
2019	$ 379
2020	374
2021	369
2022	364
2023	361
2024 - 2028	1,762
U.S. [Member] \| Pension Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payments [Abstract]
2019	5,325
2020	4,858
2021	4,720
2022	4,603
2023	4,491
2024 - 2028	20,803
Non-U.S. [Member] \| Pension Plan [Member]
Defined Benefit Plan, Expected Future Benefit Payments [Abstract]
2019	1,360
2020	1,212
2021	1,174
2022	1,144
2023	1,113
2024 - 2028	$ 5,116

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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