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Pension And Other Postretirement Benefits (Components Of The Plans' Net Periodic Benefits Cost) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Pension Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Service Cost | $ 7.5 |  | $ 8.0 | $ 15.1 | $ 16.0
Interest cost | 7.9 |  | 13.5 | 15.6 | 27.0
Expected return on assets | (25.3) |  | (28.4) | (51.1) | (56.8)
Amortization of prior service credit | 0.0 |  | 0.2 | 0.0 | 0.4
Recognized actuarial loss | 5.5 |  | 8.7 | 10.8 | 17.4
Settlement loss | (3.3) | $ (3.3) | 0.0 | (6.6) | 0.0
Total Net Periodic Benefits Cost | (1.1) |  | 2.0 | (3.0) | 4.0
Other Postretirement Benefit Plan |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |
Service Cost | 1.5 |  | 1.6 | 3.0 | 3.2
Interest cost | 2.5 |  | 3.9 | 5.0 | 7.8
Expected return on assets | (3.8) |  | (3.6) | (7.6) | (7.2)
Amortization of prior service credit | (0.6) |  | (0.5) | (1.2) | (1.0)
Recognized actuarial loss | 1.2 |  | 1.3 | 2.4 | 2.6
Settlement loss | 0.0 |  | 0.0 | 0.0 | 0.0
Total Net Periodic Benefits Cost | $ 0.8 |  | $ 2.7 | $ 1.6 | $ 5.4

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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 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=123450688&loc=d3e4587-114921 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 45 -Paragraph 3A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123453770&loc=SL108413299-114919 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 + Details
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