Retirement Plans and Other Retiree Benefits - Expected Contributions and Benefit Payments (Details) $ in Millions	12 Months Ended
Dec. 31, 2019 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Expected benefit payments from company assets	$ 55
Total benefit payments [Abstract]
2020	231
2021	234
2022	239
2023	240
2024	247
2025-2029	1,213
Other Retiree Benefit Plans
Total benefit payments [Abstract]
2020	49
2021	50
2022	51
2023	52
2024	53
2025-2029	272
United States \| Pension Plans
Total benefit payments [Abstract]
2020	146
2021	147
2022	151
2023	149
2024	152
2025-2029	722
International \| Pension Plans
Total benefit payments [Abstract]
2020	36
2021	37
2022	37
2023	39
2024	42
2025-2029	$ 219

Expected Benefit Payments From Company's Assets to be paid in year one.

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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=118255775&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 second fiscal year following latest fiscal year.

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