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Pension and Other Postretirement Benefits (Schedule Of One-Percentage-Point Change In Assumed Health Care Cost Trend Rates) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items] |
Effect on service and interest components of net periodic cost, 1% point increase | $ 1.3
Effect on service and interest components of net periodic cost, 1% point decrease | (1.1)
Effect on accumulated postretirement benefit obligation, 1% point increase | 25.0
Effect on accumulated postretirement benefit obligation, 1% point decrease | $ (22.0)

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- Definition Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate. + 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 (m) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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