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Benefit Plans - Weighted-Average Assumptions to Determine Net Periodic Postretirement Health Care Cost (Details) - Postretirement Health Care Plan | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 3.41% | 4.37% | 3.66%
Health care cost trend rate | 6.00% | 6.25% | 6.25%
Non-U.S. Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 3.86% | 4.40% | 4.24%
Health care cost trend rate | 5.42% | 5.44% | 5.56%

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- Definition Defined benefit plan assumptions used calculating net periodic benefit cost health care cost trend rate + References No definition available. + Details
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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (k)(1) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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