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Pension, Savings and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Postretirement benefits expense | $ 1 | $ 2 | $ 4 | $ 5
Defined contribution plans, contribution expenses | 25 | $ 27 | 75 | $ 83
Non-U.S. |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Expected contribution to funded pension plans in current year | 25 |  | 25 |
Contributions to pension plans |  |  | 11 |
Other Postretirement Benefits |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Curtailment credit (charge) |  |  | 4 |
Other Postretirement Benefits | U.S. |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charges | 18 |  | 21 |
Other Postretirement Benefits | U.S. | Other (Income) Expense |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charges |  |  | 5 |
Other Postretirement Benefits | Non-U.S. |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Pension settlement and termination benefits | 2 |  | 7 |
Other Postretirement Benefits | Non-U.S. | Other (Income) Expense |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Settlement charges | $ 16 |  | $ 19 |

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- Definition Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e2709-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4587-114921 + Details
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