Pension and Other Postretirement Benefit Plans (Expected Benefit Payments) (Details) $ in Millions	Dec. 31, 2020 USD ($)
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]
2021	$ 25
2022	25
2023	24
2024	10
2025	9
2026-2030	43
United States Pension Benefits \| Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]
2021	294
2022	243
2023	236
2024	231
2025	222
2026-2030	989
Foreign Pension Benefits \| Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]
2021	39
2022	40
2023	41
2024	40
2025	45
2026-2030	$ 234

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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 benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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

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

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