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v3.20.1

Pensions and Other Postretirement Benefits (Plan Assets) (Details) | Dec. 31, 2019 | Dec. 31, 2018
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Pension Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 100.00% | 100.00%
Pension Plans | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 48.00% | 50.00%
Pension Plans | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 42.00% | 37.00%
Pension Plans | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 10.00% | 13.00%
OPEB Plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 0.00% | 0.00%
OPEB Plans | Equity securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 0.00% | 0.00%
OPEB Plans | Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 0.00% | 0.00%
OPEB Plans | Cash and cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan assets | 0.00% | 0.00%

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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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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
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